20015715

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{1481}}^1$

素因数の和:1559

約数の個数: 32

約数和(自身を含む): 34572096

約数和(自身を除く): 14556381

約数列:

[1, 3, 5, 15, 17, 51, 53, 85, 159, 255, 265, 795, 901, 1481, 2703, 4443, 4505, 7405, 13515, 22215, 25177, 75531, 78493, 125885, 235479, 377655, 392465, 1177395, 1334381, 4003143, 6671905, 20015715]

約数ペア:

[(1, 20015715), (3, 6671905), (5, 4003143), (15, 1334381), (17, 1177395), (51, 392465), (53, 377655), (85, 235479), (159, 125885), (255, 78493), (265, 75531), (795, 25177), (901, 22215), (1481, 13515), (2703, 7405), (4443, 4505)]