28004020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127291}}^1$

素因数の和:127311

約数の個数: 24

約数和(自身を含む): 64155168

約数和(自身を除く): 36151148

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 127291, 254582, 509164, 636455, 1272910, 1400201, 2545820, 2800402, 5600804, 7001005, 14002010, 28004020]

約数ペア:

[(1, 28004020), (2, 14002010), (4, 7001005), (5, 5600804), (10, 2800402), (11, 2545820), (20, 1400201), (22, 1272910), (44, 636455), (55, 509164), (110, 254582), (220, 127291)]