21060725

素因数分解:

$5^2\times 7^1\times {\mathrm{151}}^1\times {\mathrm{797}}^1$

素因数の和:965

約数の個数: 24

約数和(自身を含む): 30081408

約数和(自身を除く): 9020683

約数列:

[1, 5, 7, 25, 35, 151, 175, 755, 797, 1057, 3775, 3985, 5285, 5579, 19925, 26425, 27895, 120347, 139475, 601735, 842429, 3008675, 4212145, 21060725]

約数ペア:

[(1, 21060725), (5, 4212145), (7, 3008675), (25, 842429), (35, 601735), (151, 139475), (175, 120347), (755, 27895), (797, 26425), (1057, 19925), (3775, 5579), (3985, 5285)]