21421640

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6779}}^1$

素因数の和:6869

約数の個数: 32

約数和(自身を含む): 48816000

約数和(自身を除く): 27394360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6779, 13558, 27116, 33895, 54232, 67790, 135580, 271160, 535541, 1071082, 2142164, 2677705, 4284328, 5355410, 10710820, 21421640]

約数ペア:

[(1, 21421640), (2, 10710820), (4, 5355410), (5, 4284328), (8, 2677705), (10, 2142164), (20, 1071082), (40, 535541), (79, 271160), (158, 135580), (316, 67790), (395, 54232), (632, 33895), (790, 27116), (1580, 13558), (3160, 6779)]