28707820

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{23531}}^1$

素因数の和:23601

約数の個数: 24

約数和(自身を含む): 61277328

約数和(自身を除く): 32569508

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 23531, 47062, 94124, 117655, 235310, 470620, 1435391, 2870782, 5741564, 7176955, 14353910, 28707820]

約数ペア:

[(1, 28707820), (2, 14353910), (4, 7176955), (5, 5741564), (10, 2870782), (20, 1435391), (61, 470620), (122, 235310), (244, 117655), (305, 94124), (610, 47062), (1220, 23531)]