20438120

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{773}}^1$

素因数の和:1445

約数の個数: 32

約数和(自身を含む): 46114920

約数和(自身を除く): 25676800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 773, 1322, 1546, 2644, 3092, 3305, 3865, 5288, 6184, 6610, 7730, 13220, 15460, 26440, 30920, 510953, 1021906, 2043812, 2554765, 4087624, 5109530, 10219060, 20438120]

約数ペア:

[(1, 20438120), (2, 10219060), (4, 5109530), (5, 4087624), (8, 2554765), (10, 2043812), (20, 1021906), (40, 510953), (661, 30920), (773, 26440), (1322, 15460), (1546, 13220), (2644, 7730), (3092, 6610), (3305, 6184), (3865, 5288)]