21075580

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61987}}^1$

素因数の和:62013

約数の個数: 24

約数和(自身を含む): 46862928

約数和(自身を除く): 25787348

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 61987, 123974, 247948, 309935, 619870, 1053779, 1239740, 2107558, 4215116, 5268895, 10537790, 21075580]

約数ペア:

[(1, 21075580), (2, 10537790), (4, 5268895), (5, 4215116), (10, 2107558), (17, 1239740), (20, 1053779), (34, 619870), (68, 309935), (85, 247948), (170, 123974), (340, 61987)]