20637320

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:159

約数の個数: 128

約数和(自身を含む): 55987200

約数和(自身を除く): 35349880

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 31, 34, 40, 44, 55, 62, 68, 85, 88, 89, 110, 124, 136, 155, 170, 178, 187, 220, 248, 310, 340, 341, 356, 374, 440, 445, 527, 620, 680, 682, 712, 748, 890, 935, 979, 1054, 1240, 1364, 1496, 1513, 1705, 1780, 1870, 1958, 2108, 2635, 2728, 2759, 3026, 3410, 3560, 3740, 3916, 4216, 4895, 5270, 5518, 5797, 6052, 6820, 7480, 7565, 7832, 9790, 10540, 11036, 11594, 12104, 13640, 13795, 15130, 16643, 19580, 21080, 22072, 23188, 27590, 28985, 30260, 30349, 33286, 39160, 46376, 46903, 55180, 57970, 60520, 60698, 66572, 83215, 93806, 110360, 115940, 121396, 133144, 151745, 166430, 187612, 231880, 234515, 242792, 303490, 332860, 375224, 469030, 515933, 606980, 665720, 938060, 1031866, 1213960, 1876120, 2063732, 2579665, 4127464, 5159330, 10318660, 20637320]

約数ペア:

[(1, 20637320), (2, 10318660), (4, 5159330), (5, 4127464), (8, 2579665), (10, 2063732), (11, 1876120), (17, 1213960), (20, 1031866), (22, 938060), (31, 665720), (34, 606980), (40, 515933), (44, 469030), (55, 375224), (62, 332860), (68, 303490), (85, 242792), (88, 234515), (89, 231880), (110, 187612), (124, 166430), (136, 151745), (155, 133144), (170, 121396), (178, 115940), (187, 110360), (220, 93806), (248, 83215), (310, 66572), (340, 60698), (341, 60520), (356, 57970), (374, 55180), (440, 46903), (445, 46376), (527, 39160), (620, 33286), (680, 30349), (682, 30260), (712, 28985), (748, 27590), (890, 23188), (935, 22072), (979, 21080), (1054, 19580), (1240, 16643), (1364, 15130), (1496, 13795), (1513, 13640), (1705, 12104), (1780, 11594), (1870, 11036), (1958, 10540), (2108, 9790), (2635, 7832), (2728, 7565), (2759, 7480), (3026, 6820), (3410, 6052), (3560, 5797), (3740, 5518), (3916, 5270), (4216, 4895)]