21164915810

素因数分解:

$2^1\times 5^1\times {\mathrm{1601}}^1\times {\mathrm{1321981}}^1$

素因数の和:1323589

約数の個数: 16

約数和(自身を含む): 38120672952

約数和(自身を除く): 16955757142

約数列:

[1, 2, 5, 10, 1601, 3202, 8005, 16010, 1321981, 2643962, 6609905, 13219810, 2116491581, 4232983162, 10582457905, 21164915810]

約数ペア:

[(1, 21164915810), (2, 10582457905), (5, 4232983162), (10, 2116491581), (1601, 13219810), (3202, 6609905), (8005, 2643962), (16010, 1321981)]