77777765

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{211}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 103856256

約数和(自身を除く): 26078491

約数列:

[1, 5, 13, 53, 65, 107, 211, 265, 535, 689, 1055, 1391, 2743, 3445, 5671, 6955, 11183, 13715, 22577, 28355, 55915, 73723, 112885, 145379, 293501, 368615, 726895, 1196581, 1467505, 5982905, 15555553, 77777765]

約数ペア:

[(1, 77777765), (5, 15555553), (13, 5982905), (53, 1467505), (65, 1196581), (107, 726895), (211, 368615), (265, 293501), (535, 145379), (689, 112885), (1055, 73723), (1391, 55915), (2743, 28355), (3445, 22577), (5671, 13715), (6955, 11183)]