21790405

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{577}}^1$

素因数の和:685

約数の個数: 32

約数和(自身を含む): 32626944

約数和(自身を除く): 10836539

約数列:

[1, 5, 7, 13, 35, 65, 83, 91, 415, 455, 577, 581, 1079, 2885, 2905, 4039, 5395, 7501, 7553, 20195, 37505, 37765, 47891, 52507, 239455, 262535, 335237, 622583, 1676185, 3112915, 4358081, 21790405]

約数ペア:

[(1, 21790405), (5, 4358081), (7, 3112915), (13, 1676185), (35, 622583), (65, 335237), (83, 262535), (91, 239455), (415, 52507), (455, 47891), (577, 37765), (581, 37505), (1079, 20195), (2885, 7553), (2905, 7501), (4039, 5395)]