20712400

素因数分解:

$2^4\times 5^2\times {\mathrm{53}}^1\times {\mathrm{977}}^1$

素因数の和:1048

約数の個数: 60

約数和(自身を含む): 50752332

約数和(自身を除く): 30039932

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 53, 80, 100, 106, 200, 212, 265, 400, 424, 530, 848, 977, 1060, 1325, 1954, 2120, 2650, 3908, 4240, 4885, 5300, 7816, 9770, 10600, 15632, 19540, 21200, 24425, 39080, 48850, 51781, 78160, 97700, 103562, 195400, 207124, 258905, 390800, 414248, 517810, 828496, 1035620, 1294525, 2071240, 2589050, 4142480, 5178100, 10356200, 20712400]

約数ペア:

[(1, 20712400), (2, 10356200), (4, 5178100), (5, 4142480), (8, 2589050), (10, 2071240), (16, 1294525), (20, 1035620), (25, 828496), (40, 517810), (50, 414248), (53, 390800), (80, 258905), (100, 207124), (106, 195400), (200, 103562), (212, 97700), (265, 78160), (400, 51781), (424, 48850), (530, 39080), (848, 24425), (977, 21200), (1060, 19540), (1325, 15632), (1954, 10600), (2120, 9770), (2650, 7816), (3908, 5300), (4240, 4885)]