21155380

素因数分解:

$2^2\times 5^1\times {\mathrm{919}}^1\times {\mathrm{1151}}^1$

素因数の和:2079

約数の個数: 24

約数和(自身を含む): 44513280

約数和(自身を除く): 23357900

約数列:

[1, 2, 4, 5, 10, 20, 919, 1151, 1838, 2302, 3676, 4595, 4604, 5755, 9190, 11510, 18380, 23020, 1057769, 2115538, 4231076, 5288845, 10577690, 21155380]

約数ペア:

[(1, 21155380), (2, 10577690), (4, 5288845), (5, 4231076), (10, 2115538), (20, 1057769), (919, 23020), (1151, 18380), (1838, 11510), (2302, 9190), (3676, 5755), (4595, 4604)]