21317270

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163979}}^1$

素因数の和:163999

約数の個数: 16

約数和(自身を含む): 41322960

約数和(自身を除く): 20005690

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 163979, 327958, 819895, 1639790, 2131727, 4263454, 10658635, 21317270]

約数ペア:

[(1, 21317270), (2, 10658635), (5, 4263454), (10, 2131727), (13, 1639790), (26, 819895), (65, 327958), (130, 163979)]