21909909

素因数分解:

$3^1\times 7^2\times {\mathrm{113}}^1\times {\mathrm{1319}}^1$

素因数の和:1449

約数の個数: 24

約数和(自身を含む): 34309440

約数和(自身を除く): 12399531

約数列:

[1, 3, 7, 21, 49, 113, 147, 339, 791, 1319, 2373, 3957, 5537, 9233, 16611, 27699, 64631, 149047, 193893, 447141, 1043329, 3129987, 7303303, 21909909]

約数ペア:

[(1, 21909909), (3, 7303303), (7, 3129987), (21, 1043329), (49, 447141), (113, 193893), (147, 149047), (339, 64631), (791, 27699), (1319, 16611), (2373, 9233), (3957, 5537)]