21619740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{881}}^1$

素因数の和:1302

約数の個数: 48

約数和(自身を含む): 60752160

約数和(自身を除く): 39132420

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 409, 818, 881, 1227, 1636, 1762, 2045, 2454, 2643, 3524, 4090, 4405, 4908, 5286, 6135, 8180, 8810, 10572, 12270, 13215, 17620, 24540, 26430, 52860, 360329, 720658, 1080987, 1441316, 1801645, 2161974, 3603290, 4323948, 5404935, 7206580, 10809870, 21619740]

約数ペア:

[(1, 21619740), (2, 10809870), (3, 7206580), (4, 5404935), (5, 4323948), (6, 3603290), (10, 2161974), (12, 1801645), (15, 1441316), (20, 1080987), (30, 720658), (60, 360329), (409, 52860), (818, 26430), (881, 24540), (1227, 17620), (1636, 13215), (1762, 12270), (2045, 10572), (2454, 8810), (2643, 8180), (3524, 6135), (4090, 5286), (4405, 4908)]