989404

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{359}}^1$

素因数の和:429

約数の個数: 24

約数和(自身を含む): 1905120

約数和(自身を除く): 915716

約数列:

[1, 2, 4, 13, 26, 52, 53, 106, 212, 359, 689, 718, 1378, 1436, 2756, 4667, 9334, 18668, 19027, 38054, 76108, 247351, 494702, 989404]

約数ペア:

[(1, 989404), (2, 494702), (4, 247351), (13, 76108), (26, 38054), (52, 19027), (53, 18668), (106, 9334), (212, 4667), (359, 2756), (689, 1436), (718, 1378)]