21521507

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{223}}^1\times {\mathrm{811}}^1$

素因数の和:1058

約数の個数: 16

約数和(自身を含む): 26191872

約数和(自身を除く): 4670365

約数列:

[1, 7, 17, 119, 223, 811, 1561, 3791, 5677, 13787, 26537, 96509, 180853, 1265971, 3074501, 21521507]

約数ペア:

[(1, 21521507), (7, 3074501), (17, 1265971), (119, 180853), (223, 96509), (811, 26537), (1561, 13787), (3791, 5677)]