21028408

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{1051}}^1$

素因数の和:1159

約数の個数: 32

約数和(自身を含む): 41091120

約数和(自身を除く): 20062712

約数列:

[1, 2, 4, 8, 41, 61, 82, 122, 164, 244, 328, 488, 1051, 2102, 2501, 4204, 5002, 8408, 10004, 20008, 43091, 64111, 86182, 128222, 172364, 256444, 344728, 512888, 2628551, 5257102, 10514204, 21028408]

約数ペア:

[(1, 21028408), (2, 10514204), (4, 5257102), (8, 2628551), (41, 512888), (61, 344728), (82, 256444), (122, 172364), (164, 128222), (244, 86182), (328, 64111), (488, 43091), (1051, 20008), (2102, 10004), (2501, 8408), (4204, 5002)]