28778895

素因数分解:

$3^4\times 5^1\times {\mathrm{71059}}^1$

素因数の和:71076

約数の個数: 20

約数和(自身を含む): 51589560

約数和(自身を除く): 22810665

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 71059, 213177, 355295, 639531, 1065885, 1918593, 3197655, 5755779, 9592965, 28778895]

約数ペア:

[(1, 28778895), (3, 9592965), (5, 5755779), (9, 3197655), (15, 1918593), (27, 1065885), (45, 639531), (81, 355295), (135, 213177), (405, 71059)]