21689440

素因数分解:

$2^5\times 5^1\times {\mathrm{135559}}^1$

素因数の和:135574

約数の個数: 24

約数和(自身を含む): 51241680

約数和(自身を除く): 29552240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 135559, 271118, 542236, 677795, 1084472, 1355590, 2168944, 2711180, 4337888, 5422360, 10844720, 21689440]

約数ペア:

[(1, 21689440), (2, 10844720), (4, 5422360), (5, 4337888), (8, 2711180), (10, 2168944), (16, 1355590), (20, 1084472), (32, 677795), (40, 542236), (80, 271118), (160, 135559)]