64708400

素因数分解:

$2^4\times 5^2\times {\mathrm{161771}}^1$

素因数の和:161789

約数の個数: 30

約数和(自身を含む): 155462892

約数和(自身を除く): 90754492

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 161771, 323542, 647084, 808855, 1294168, 1617710, 2588336, 3235420, 4044275, 6470840, 8088550, 12941680, 16177100, 32354200, 64708400]

約数ペア:

[(1, 64708400), (2, 32354200), (4, 16177100), (5, 12941680), (8, 8088550), (10, 6470840), (16, 4044275), (20, 3235420), (25, 2588336), (40, 1617710), (50, 1294168), (80, 808855), (100, 647084), (200, 323542), (400, 161771)]