21445385

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^2\times {\mathrm{241}}^1$

素因数の和:333

約数の個数: 24

約数和(自身を含む): 28601496

約数和(自身を除く): 7156111

約数列:

[1, 5, 13, 37, 65, 185, 241, 481, 1205, 1369, 2405, 3133, 6845, 8917, 15665, 17797, 44585, 88985, 115921, 329929, 579605, 1649645, 4289077, 21445385]

約数ペア:

[(1, 21445385), (5, 4289077), (13, 1649645), (37, 579605), (65, 329929), (185, 115921), (241, 88985), (481, 44585), (1205, 17797), (1369, 15665), (2405, 8917), (3133, 6845)]