21365305

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{8017}}^1$

素因数の和:8076

約数の個数: 16

約数和(自身を含む): 28287504

約数和(自身を除く): 6922199

約数列:

[1, 5, 13, 41, 65, 205, 533, 2665, 8017, 40085, 104221, 328697, 521105, 1643485, 4273061, 21365305]

約数ペア:

[(1, 21365305), (5, 4273061), (13, 1643485), (41, 521105), (65, 328697), (205, 104221), (533, 40085), (2665, 8017)]