21513725

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{151}}^1$

素因数の和:341

約数の個数: 24

約数和(自身を含む): 27706560

約数和(自身を除く): 6192835

約数列:

[1, 5, 25, 41, 139, 151, 205, 695, 755, 1025, 3475, 3775, 5699, 6191, 20989, 28495, 30955, 104945, 142475, 154775, 524725, 860549, 4302745, 21513725]

約数ペア:

[(1, 21513725), (5, 4302745), (25, 860549), (41, 524725), (139, 154775), (151, 142475), (205, 104945), (695, 30955), (755, 28495), (1025, 20989), (3475, 6191), (3775, 5699)]