81090100

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1$

素因数の和:127

約数の個数: 216

約数和(自身を含む): 235505760

約数和(自身を除く): 154415660

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 19, 20, 25, 26, 28, 35, 38, 49, 50, 52, 65, 67, 70, 76, 91, 95, 98, 100, 130, 133, 134, 140, 175, 182, 190, 196, 245, 247, 260, 266, 268, 325, 335, 350, 364, 380, 455, 469, 475, 490, 494, 532, 637, 650, 665, 670, 700, 871, 910, 931, 938, 950, 980, 988, 1225, 1235, 1273, 1274, 1300, 1330, 1340, 1675, 1729, 1742, 1820, 1862, 1876, 1900, 2275, 2345, 2450, 2470, 2546, 2548, 2660, 3185, 3283, 3325, 3350, 3458, 3484, 3724, 4355, 4550, 4655, 4690, 4900, 4940, 5092, 6097, 6175, 6365, 6370, 6566, 6650, 6700, 6916, 8645, 8710, 8911, 9100, 9310, 9380, 11725, 12103, 12194, 12350, 12730, 12740, 13132, 13300, 15925, 16415, 16549, 17290, 17420, 17822, 18620, 21775, 23275, 23450, 24206, 24388, 24700, 25460, 30485, 31825, 31850, 32830, 33098, 34580, 35644, 42679, 43225, 43550, 44555, 46550, 46900, 48412, 60515, 60970, 62377, 63650, 63700, 65660, 66196, 82075, 82745, 85358, 86450, 87100, 89110, 93100, 115843, 121030, 121940, 124754, 127300, 152425, 164150, 165490, 170716, 172900, 178220, 213395, 222775, 231686, 242060, 249508, 302575, 304850, 311885, 328300, 330980, 413725, 426790, 445550, 463372, 579215, 605150, 609700, 623770, 810901, 827450, 853580, 891100, 1066975, 1158430, 1210300, 1247540, 1559425, 1621802, 1654900, 2133950, 2316860, 2896075, 3118850, 3243604, 4054505, 4267900, 5792150, 6237700, 8109010, 11584300, 16218020, 20272525, 40545050, 81090100]

約数ペア:

[(1, 81090100), (2, 40545050), (4, 20272525), (5, 16218020), (7, 11584300), (10, 8109010), (13, 6237700), (14, 5792150), (19, 4267900), (20, 4054505), (25, 3243604), (26, 3118850), (28, 2896075), (35, 2316860), (38, 2133950), (49, 1654900), (50, 1621802), (52, 1559425), (65, 1247540), (67, 1210300), (70, 1158430), (76, 1066975), (91, 891100), (95, 853580), (98, 827450), (100, 810901), (130, 623770), (133, 609700), (134, 605150), (140, 579215), (175, 463372), (182, 445550), (190, 426790), (196, 413725), (245, 330980), (247, 328300), (260, 311885), (266, 304850), (268, 302575), (325, 249508), (335, 242060), (350, 231686), (364, 222775), (380, 213395), (455, 178220), (469, 172900), (475, 170716), (490, 165490), (494, 164150), (532, 152425), (637, 127300), (650, 124754), (665, 121940), (670, 121030), (700, 115843), (871, 93100), (910, 89110), (931, 87100), (938, 86450), (950, 85358), (980, 82745), (988, 82075), (1225, 66196), (1235, 65660), (1273, 63700), (1274, 63650), (1300, 62377), (1330, 60970), (1340, 60515), (1675, 48412), (1729, 46900), (1742, 46550), (1820, 44555), (1862, 43550), (1876, 43225), (1900, 42679), (2275, 35644), (2345, 34580), (2450, 33098), (2470, 32830), (2546, 31850), (2548, 31825), (2660, 30485), (3185, 25460), (3283, 24700), (3325, 24388), (3350, 24206), (3458, 23450), (3484, 23275), (3724, 21775), (4355, 18620), (4550, 17822), (4655, 17420), (4690, 17290), (4900, 16549), (4940, 16415), (5092, 15925), (6097, 13300), (6175, 13132), (6365, 12740), (6370, 12730), (6566, 12350), (6650, 12194), (6700, 12103), (6916, 11725), (8645, 9380), (8710, 9310), (8911, 9100)]