21292020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:214

約数の個数: 144

約数和(自身を含む): 69713280

約数和(自身を除く): 48421260

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 37, 45, 46, 60, 69, 74, 90, 92, 111, 115, 138, 139, 148, 180, 185, 207, 222, 230, 276, 278, 333, 345, 370, 414, 417, 444, 460, 555, 556, 666, 690, 695, 740, 828, 834, 851, 1035, 1110, 1251, 1332, 1380, 1390, 1665, 1668, 1702, 2070, 2085, 2220, 2502, 2553, 2780, 3197, 3330, 3404, 4140, 4170, 4255, 5004, 5106, 5143, 6255, 6394, 6660, 7659, 8340, 8510, 9591, 10212, 10286, 12510, 12765, 12788, 15318, 15429, 15985, 17020, 19182, 20572, 25020, 25530, 25715, 28773, 30636, 30858, 31970, 38295, 38364, 46287, 47955, 51060, 51430, 57546, 61716, 63940, 76590, 77145, 92574, 95910, 102860, 115092, 118289, 143865, 153180, 154290, 185148, 191820, 231435, 236578, 287730, 308580, 354867, 462870, 473156, 575460, 591445, 709734, 925740, 1064601, 1182890, 1419468, 1774335, 2129202, 2365780, 3548670, 4258404, 5323005, 7097340, 10646010, 21292020]

約数ペア:

[(1, 21292020), (2, 10646010), (3, 7097340), (4, 5323005), (5, 4258404), (6, 3548670), (9, 2365780), (10, 2129202), (12, 1774335), (15, 1419468), (18, 1182890), (20, 1064601), (23, 925740), (30, 709734), (36, 591445), (37, 575460), (45, 473156), (46, 462870), (60, 354867), (69, 308580), (74, 287730), (90, 236578), (92, 231435), (111, 191820), (115, 185148), (138, 154290), (139, 153180), (148, 143865), (180, 118289), (185, 115092), (207, 102860), (222, 95910), (230, 92574), (276, 77145), (278, 76590), (333, 63940), (345, 61716), (370, 57546), (414, 51430), (417, 51060), (444, 47955), (460, 46287), (555, 38364), (556, 38295), (666, 31970), (690, 30858), (695, 30636), (740, 28773), (828, 25715), (834, 25530), (851, 25020), (1035, 20572), (1110, 19182), (1251, 17020), (1332, 15985), (1380, 15429), (1390, 15318), (1665, 12788), (1668, 12765), (1702, 12510), (2070, 10286), (2085, 10212), (2220, 9591), (2502, 8510), (2553, 8340), (2780, 7659), (3197, 6660), (3330, 6394), (3404, 6255), (4140, 5143), (4170, 5106), (4255, 5004)]