21878600

素因数分解:

$2^3\times 5^2\times {\mathrm{139}}^1\times {\mathrm{787}}^1$

素因数の和:942

約数の個数: 48

約数和(自身を含む): 51298800

約数和(自身を除く): 29420200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 139, 200, 278, 556, 695, 787, 1112, 1390, 1574, 2780, 3148, 3475, 3935, 5560, 6296, 6950, 7870, 13900, 15740, 19675, 27800, 31480, 39350, 78700, 109393, 157400, 218786, 437572, 546965, 875144, 1093930, 2187860, 2734825, 4375720, 5469650, 10939300, 21878600]

約数ペア:

[(1, 21878600), (2, 10939300), (4, 5469650), (5, 4375720), (8, 2734825), (10, 2187860), (20, 1093930), (25, 875144), (40, 546965), (50, 437572), (100, 218786), (139, 157400), (200, 109393), (278, 78700), (556, 39350), (695, 31480), (787, 27800), (1112, 19675), (1390, 15740), (1574, 13900), (2780, 7870), (3148, 6950), (3475, 6296), (3935, 5560)]