21784724

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{5303}}^1$

素因数の和:5399

約数の個数: 24

約数和(自身を含む): 41583360

約数和(自身を除く): 19798636

約数列:

[1, 2, 4, 13, 26, 52, 79, 158, 316, 1027, 2054, 4108, 5303, 10606, 21212, 68939, 137878, 275756, 418937, 837874, 1675748, 5446181, 10892362, 21784724]

約数ペア:

[(1, 21784724), (2, 10892362), (4, 5446181), (13, 1675748), (26, 837874), (52, 418937), (79, 275756), (158, 137878), (316, 68939), (1027, 21212), (2054, 10606), (4108, 5303)]