21207925

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{359}}^1$

素因数の和:525

約数の個数: 24

約数和(自身を含む): 28123200

約数和(自身を除く): 6915275

約数列:

[1, 5, 17, 25, 85, 139, 359, 425, 695, 1795, 2363, 3475, 6103, 8975, 11815, 30515, 49901, 59075, 152575, 249505, 848317, 1247525, 4241585, 21207925]

約数ペア:

[(1, 21207925), (5, 4241585), (17, 1247525), (25, 848317), (85, 249505), (139, 152575), (359, 59075), (425, 49901), (695, 30515), (1795, 11815), (2363, 8975), (3475, 6103)]