20847700

素因数分解:

$2^2\times 5^2\times {\mathrm{163}}^1\times {\mathrm{1279}}^1$

素因数の和:1456

約数の個数: 36

約数和(自身を含む): 45552640

約数和(自身を除く): 24704940

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 163, 326, 652, 815, 1279, 1630, 2558, 3260, 4075, 5116, 6395, 8150, 12790, 16300, 25580, 31975, 63950, 127900, 208477, 416954, 833908, 1042385, 2084770, 4169540, 5211925, 10423850, 20847700]

約数ペア:

[(1, 20847700), (2, 10423850), (4, 5211925), (5, 4169540), (10, 2084770), (20, 1042385), (25, 833908), (50, 416954), (100, 208477), (163, 127900), (326, 63950), (652, 31975), (815, 25580), (1279, 16300), (1630, 12790), (2558, 8150), (3260, 6395), (4075, 5116)]