21687225

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{101}}^1\times {\mathrm{409}}^1$

素因数の和:530

約数の個数: 48

約数和(自身を含む): 41485440

約数和(自身を除く): 19798215

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 101, 105, 175, 303, 409, 505, 525, 707, 1227, 1515, 2045, 2121, 2525, 2863, 3535, 6135, 7575, 8589, 10225, 10605, 14315, 17675, 30675, 41309, 42945, 53025, 71575, 123927, 206545, 214725, 289163, 619635, 867489, 1032725, 1445815, 3098175, 4337445, 7229075, 21687225]

約数ペア:

[(1, 21687225), (3, 7229075), (5, 4337445), (7, 3098175), (15, 1445815), (21, 1032725), (25, 867489), (35, 619635), (75, 289163), (101, 214725), (105, 206545), (175, 123927), (303, 71575), (409, 53025), (505, 42945), (525, 41309), (707, 30675), (1227, 17675), (1515, 14315), (2045, 10605), (2121, 10225), (2525, 8589), (2863, 7575), (3535, 6135)]