638860131

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{780049}}^1$

素因数の和:780075

約数の個数: 24

約数和(自身を含む): 1135752800

約数和(自身を除く): 496892669

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 780049, 2340147, 5460343, 7020441, 10140637, 16381029, 30421911, 49143087, 70984459, 91265733, 212953377, 638860131]

約数ペア:

[(1, 638860131), (3, 212953377), (7, 91265733), (9, 70984459), (13, 49143087), (21, 30421911), (39, 16381029), (63, 10140637), (91, 7020441), (117, 5460343), (273, 2340147), (819, 780049)]