20782420

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5741}}^1$

素因数の和:5931

約数の個数: 24

約数和(自身を含む): 43891848

約数和(自身を除く): 23109428

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 5741, 11482, 22964, 28705, 57410, 114820, 1039121, 2078242, 4156484, 5195605, 10391210, 20782420]

約数ペア:

[(1, 20782420), (2, 10391210), (4, 5195605), (5, 4156484), (10, 2078242), (20, 1039121), (181, 114820), (362, 57410), (724, 28705), (905, 22964), (1810, 11482), (3620, 5741)]