21130990

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{51539}}^1$

素因数の和:51587

約数の個数: 16

約数和(自身を含む): 38964240

約数和(自身を除く): 17833250

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 51539, 103078, 257695, 515390, 2113099, 4226198, 10565495, 21130990]

約数ペア:

[(1, 21130990), (2, 10565495), (5, 4226198), (10, 2113099), (41, 515390), (82, 257695), (205, 103078), (410, 51539)]