20211215

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{71}}^1\times {\mathrm{197}}^1$

素因数の和:307

約数の個数: 24

約数和(自身を含む): 26259552

約数和(自身を除く): 6048337

約数列:

[1, 5, 17, 71, 85, 197, 289, 355, 985, 1207, 1445, 3349, 6035, 13987, 16745, 20519, 56933, 69935, 102595, 237779, 284665, 1188895, 4042243, 20211215]

約数ペア:

[(1, 20211215), (5, 4042243), (17, 1188895), (71, 284665), (85, 237779), (197, 102595), (289, 69935), (355, 56933), (985, 20519), (1207, 16745), (1445, 13987), (3349, 6035)]