20998570

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{829}}^1$

素因数の和:1002

約数の個数: 32

約数和(自身を含む): 40338000

約数和(自身を除く): 19339430

約数列:

[1, 2, 5, 10, 17, 34, 85, 149, 170, 298, 745, 829, 1490, 1658, 2533, 4145, 5066, 8290, 12665, 14093, 25330, 28186, 70465, 123521, 140930, 247042, 617605, 1235210, 2099857, 4199714, 10499285, 20998570]

約数ペア:

[(1, 20998570), (2, 10499285), (5, 4199714), (10, 2099857), (17, 1235210), (34, 617605), (85, 247042), (149, 140930), (170, 123521), (298, 70465), (745, 28186), (829, 25330), (1490, 14093), (1658, 12665), (2533, 8290), (4145, 5066)]