21220270

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1\times {\mathrm{211}}^1$

素因数の和:420

約数の個数: 32

約数和(自身を含む): 39152160

約数和(自身を除く): 17931890

約数列:

[1, 2, 5, 10, 89, 113, 178, 211, 226, 422, 445, 565, 890, 1055, 1130, 2110, 10057, 18779, 20114, 23843, 37558, 47686, 50285, 93895, 100570, 119215, 187790, 238430, 2122027, 4244054, 10610135, 21220270]

約数ペア:

[(1, 21220270), (2, 10610135), (5, 4244054), (10, 2122027), (89, 238430), (113, 187790), (178, 119215), (211, 100570), (226, 93895), (422, 50285), (445, 47686), (565, 37558), (890, 23843), (1055, 20114), (1130, 18779), (2110, 10057)]