20488100

素因数分解:

$2^2\times 5^2\times {\mathrm{211}}^1\times {\mathrm{971}}^1$

素因数の和:1196

約数の個数: 36

約数和(自身を含む): 44715888

約数和(自身を除く): 24227788

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 211, 422, 844, 971, 1055, 1942, 2110, 3884, 4220, 4855, 5275, 9710, 10550, 19420, 21100, 24275, 48550, 97100, 204881, 409762, 819524, 1024405, 2048810, 4097620, 5122025, 10244050, 20488100]

約数ペア:

[(1, 20488100), (2, 10244050), (4, 5122025), (5, 4097620), (10, 2048810), (20, 1024405), (25, 819524), (50, 409762), (100, 204881), (211, 97100), (422, 48550), (844, 24275), (971, 21100), (1055, 19420), (1942, 10550), (2110, 9710), (3884, 5275), (4220, 4855)]