20523880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1361}}^1$

素因数の和:1414

約数の個数: 64

約数和(自身を含む): 51483600

約数和(自身を除く): 30959720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 29, 40, 52, 58, 65, 104, 116, 130, 145, 232, 260, 290, 377, 520, 580, 754, 1160, 1361, 1508, 1885, 2722, 3016, 3770, 5444, 6805, 7540, 10888, 13610, 15080, 17693, 27220, 35386, 39469, 54440, 70772, 78938, 88465, 141544, 157876, 176930, 197345, 315752, 353860, 394690, 513097, 707720, 789380, 1026194, 1578760, 2052388, 2565485, 4104776, 5130970, 10261940, 20523880]

約数ペア:

[(1, 20523880), (2, 10261940), (4, 5130970), (5, 4104776), (8, 2565485), (10, 2052388), (13, 1578760), (20, 1026194), (26, 789380), (29, 707720), (40, 513097), (52, 394690), (58, 353860), (65, 315752), (104, 197345), (116, 176930), (130, 157876), (145, 141544), (232, 88465), (260, 78938), (290, 70772), (377, 54440), (520, 39469), (580, 35386), (754, 27220), (1160, 17693), (1361, 15080), (1508, 13610), (1885, 10888), (2722, 7540), (3016, 6805), (3770, 5444)]