21528715

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19483}}^1$

素因数の和:19518

約数の個数: 16

約数和(自身を含む): 29459808

約数和(自身を除く): 7931093

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19483, 97415, 253279, 331211, 1266395, 1656055, 4305743, 21528715]

約数ペア:

[(1, 21528715), (5, 4305743), (13, 1656055), (17, 1266395), (65, 331211), (85, 253279), (221, 97415), (1105, 19483)]