20545815

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{151}}^1\times {\mathrm{193}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 33970176

約数和(自身を除く): 13424361

約数列:

[1, 3, 5, 15, 47, 141, 151, 193, 235, 453, 579, 705, 755, 965, 2265, 2895, 7097, 9071, 21291, 27213, 29143, 35485, 45355, 87429, 106455, 136065, 145715, 437145, 1369721, 4109163, 6848605, 20545815]

約数ペア:

[(1, 20545815), (3, 6848605), (5, 4109163), (15, 1369721), (47, 437145), (141, 145715), (151, 136065), (193, 106455), (235, 87429), (453, 45355), (579, 35485), (705, 29143), (755, 27213), (965, 21291), (2265, 9071), (2895, 7097)]