25801780

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{21149}}^1$

素因数の和:21219

約数の個数: 24

約数和(自身を含む): 55074600

約数和(自身を除く): 29272820

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 21149, 42298, 84596, 105745, 211490, 422980, 1290089, 2580178, 5160356, 6450445, 12900890, 25801780]

約数ペア:

[(1, 25801780), (2, 12900890), (4, 6450445), (5, 5160356), (10, 2580178), (20, 1290089), (61, 422980), (122, 211490), (244, 105745), (305, 84596), (610, 42298), (1220, 21149)]