21033160

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1249}}^1$

素因数の和:1681

約数の個数: 32

約数和(自身を含む): 47475000

約数和(自身を除く): 26441840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1249, 1684, 2105, 2498, 3368, 4210, 4996, 6245, 8420, 9992, 12490, 16840, 24980, 49960, 525829, 1051658, 2103316, 2629145, 4206632, 5258290, 10516580, 21033160]

約数ペア:

[(1, 21033160), (2, 10516580), (4, 5258290), (5, 4206632), (8, 2629145), (10, 2103316), (20, 1051658), (40, 525829), (421, 49960), (842, 24980), (1249, 16840), (1684, 12490), (2105, 9992), (2498, 8420), (3368, 6245), (4210, 4996)]