778800980

素因数分解:

$2^2\times 5^1\times {\mathrm{2251}}^1\times {\mathrm{17299}}^1$

素因数の和:19559

約数の個数: 24

約数和(自身を含む): 1636303200

約数和(自身を除く): 857502220

約数列:

[1, 2, 4, 5, 10, 20, 2251, 4502, 9004, 11255, 17299, 22510, 34598, 45020, 69196, 86495, 172990, 345980, 38940049, 77880098, 155760196, 194700245, 389400490, 778800980]

約数ペア:

[(1, 778800980), (2, 389400490), (4, 194700245), (5, 155760196), (10, 77880098), (20, 38940049), (2251, 345980), (4502, 172990), (9004, 86495), (11255, 69196), (17299, 45020), (22510, 34598)]