21142653

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{233}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 33696000

約数和(自身を除く): 12553347

約数列:

[1, 3, 7, 21, 29, 87, 149, 203, 233, 447, 609, 699, 1043, 1631, 3129, 4321, 4893, 6757, 12963, 20271, 30247, 34717, 47299, 90741, 104151, 141897, 243019, 729057, 1006793, 3020379, 7047551, 21142653]

約数ペア:

[(1, 21142653), (3, 7047551), (7, 3020379), (21, 1006793), (29, 729057), (87, 243019), (149, 141897), (203, 104151), (233, 90741), (447, 47299), (609, 34717), (699, 30247), (1043, 20271), (1631, 12963), (3129, 6757), (4321, 4893)]