21512290

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{739}}^1$

素因数の和:858

約数の個数: 32

約数和(自身を含む): 40279680

約数和(自身を除く): 18767390

約数列:

[1, 2, 5, 10, 41, 71, 82, 142, 205, 355, 410, 710, 739, 1478, 2911, 3695, 5822, 7390, 14555, 29110, 30299, 52469, 60598, 104938, 151495, 262345, 302990, 524690, 2151229, 4302458, 10756145, 21512290]

約数ペア:

[(1, 21512290), (2, 10756145), (5, 4302458), (10, 2151229), (41, 524690), (71, 302990), (82, 262345), (142, 151495), (205, 104938), (355, 60598), (410, 52469), (710, 30299), (739, 29110), (1478, 14555), (2911, 7390), (3695, 5822)]