21218701

素因数分解:

$7^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1\times {\mathrm{619}}^1$

素因数の和:768

約数の個数: 16

約数和(自身を含む): 24998400

約数和(自身を除く): 3779699

約数列:

[1, 7, 59, 83, 413, 581, 619, 4333, 4897, 34279, 36521, 51377, 255647, 359639, 3031243, 21218701]

約数ペア:

[(1, 21218701), (7, 3031243), (59, 359639), (83, 255647), (413, 51377), (581, 36521), (619, 34279), (4333, 4897)]