20921744

素因数分解:

$2^4\times {\mathrm{269}}^1\times {\mathrm{4861}}^1$

素因数の和:5138

約数の個数: 20

約数和(自身を含む): 40694940

約数和(自身を除く): 19773196

約数列:

[1, 2, 4, 8, 16, 269, 538, 1076, 2152, 4304, 4861, 9722, 19444, 38888, 77776, 1307609, 2615218, 5230436, 10460872, 20921744]

約数ペア:

[(1, 20921744), (2, 10460872), (4, 5230436), (8, 2615218), (16, 1307609), (269, 77776), (538, 38888), (1076, 19444), (2152, 9722), (4304, 4861)]