21221395

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{7963}}^1$

素因数の和:8022

約数の個数: 16

約数和(自身を含む): 28096992

約数和(自身を除く): 6875597

約数列:

[1, 5, 13, 41, 65, 205, 533, 2665, 7963, 39815, 103519, 326483, 517595, 1632415, 4244279, 21221395]

約数ペア:

[(1, 21221395), (5, 4244279), (13, 1632415), (41, 517595), (65, 326483), (205, 103519), (533, 39815), (2665, 7963)]