21678475

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{733}}^1$

素因数の和:776

約数の個数: 36

約数和(自身を含む): 33311856

約数和(自身を除く): 11633381

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 169, 175, 325, 455, 733, 845, 1183, 2275, 3665, 4225, 5131, 5915, 9529, 18325, 25655, 29575, 47645, 66703, 123877, 128275, 238225, 333515, 619385, 867139, 1667575, 3096925, 4335695, 21678475]

約数ペア:

[(1, 21678475), (5, 4335695), (7, 3096925), (13, 1667575), (25, 867139), (35, 619385), (65, 333515), (91, 238225), (169, 128275), (175, 123877), (325, 66703), (455, 47645), (733, 29575), (845, 25655), (1183, 18325), (2275, 9529), (3665, 5915), (4225, 5131)]