18191725

素因数分解:

$5^2\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1$

素因数の和:301

約数の個数: 24

約数和(自身を含む): 23371520

約数和(自身を除く): 5179795

約数列:

[1, 5, 25, 61, 79, 151, 305, 395, 755, 1525, 1975, 3775, 4819, 9211, 11929, 24095, 46055, 59645, 120475, 230275, 298225, 727669, 3638345, 18191725]

約数ペア:

[(1, 18191725), (5, 3638345), (25, 727669), (61, 298225), (79, 230275), (151, 120475), (305, 59645), (395, 46055), (755, 24095), (1525, 11929), (1975, 9211), (3775, 4819)]