20974780

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25579}}^1$

素因数の和:25629

約数の個数: 24

約数和(自身を含む): 45123120

約数和(自身を除く): 24148340

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25579, 51158, 102316, 127895, 255790, 511580, 1048739, 2097478, 4194956, 5243695, 10487390, 20974780]

約数ペア:

[(1, 20974780), (2, 10487390), (4, 5243695), (5, 4194956), (10, 2097478), (20, 1048739), (41, 511580), (82, 255790), (164, 127895), (205, 102316), (410, 51158), (820, 25579)]