20777775

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{233}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 36560160

約数和(自身を除く): 15782385

約数列:

[1, 3, 5, 15, 25, 29, 41, 75, 87, 123, 145, 205, 233, 435, 615, 699, 725, 1025, 1165, 1189, 2175, 3075, 3495, 3567, 5825, 5945, 6757, 9553, 17475, 17835, 20271, 28659, 29725, 33785, 47765, 89175, 101355, 143295, 168925, 238825, 277037, 506775, 716475, 831111, 1385185, 4155555, 6925925, 20777775]

約数ペア:

[(1, 20777775), (3, 6925925), (5, 4155555), (15, 1385185), (25, 831111), (29, 716475), (41, 506775), (75, 277037), (87, 238825), (123, 168925), (145, 143295), (205, 101355), (233, 89175), (435, 47765), (615, 33785), (699, 29725), (725, 28659), (1025, 20271), (1165, 17835), (1189, 17475), (2175, 9553), (3075, 6757), (3495, 5945), (3567, 5825)]