21780870

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{683}}^1\times {\mathrm{1063}}^1$

素因数の和:1756

約数の個数: 32

約数和(自身を含む): 52399872

約数和(自身を除く): 30619002

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 683, 1063, 1366, 2049, 2126, 3189, 3415, 4098, 5315, 6378, 6830, 10245, 10630, 15945, 20490, 31890, 726029, 1452058, 2178087, 3630145, 4356174, 7260290, 10890435, 21780870]

約数ペア:

[(1, 21780870), (2, 10890435), (3, 7260290), (5, 4356174), (6, 3630145), (10, 2178087), (15, 1452058), (30, 726029), (683, 31890), (1063, 20490), (1366, 15945), (2049, 10630), (2126, 10245), (3189, 6830), (3415, 6378), (4098, 5315)]