20729728

素因数分解:

$2^7\times {\mathrm{71}}^1\times {\mathrm{2281}}^1$

素因数の和:2366

約数の個数: 32

約数和(自身を含む): 41897520

約数和(自身を除く): 21167792

約数列:

[1, 2, 4, 8, 16, 32, 64, 71, 128, 142, 284, 568, 1136, 2272, 2281, 4544, 4562, 9088, 9124, 18248, 36496, 72992, 145984, 161951, 291968, 323902, 647804, 1295608, 2591216, 5182432, 10364864, 20729728]

約数ペア:

[(1, 20729728), (2, 10364864), (4, 5182432), (8, 2591216), (16, 1295608), (32, 647804), (64, 323902), (71, 291968), (128, 161951), (142, 145984), (284, 72992), (568, 36496), (1136, 18248), (2272, 9124), (2281, 9088), (4544, 4562)]