21663265

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{827}}^1$

素因数の和:889

約数の個数: 24

約数和(自身を含む): 29092608

約数和(自身を除く): 7429343

約数列:

[1, 5, 13, 31, 65, 155, 169, 403, 827, 845, 2015, 4135, 5239, 10751, 25637, 26195, 53755, 128185, 139763, 333281, 698815, 1666405, 4332653, 21663265]

約数ペア:

[(1, 21663265), (5, 4332653), (13, 1666405), (31, 698815), (65, 333281), (155, 139763), (169, 128185), (403, 53755), (827, 26195), (845, 25637), (2015, 10751), (4135, 5239)]