21155220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{117529}}^1$

素因数の和:117544

約数の個数: 36

約数和(自身を含む): 64171380

約数和(自身を除く): 43016160

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 117529, 235058, 352587, 470116, 587645, 705174, 1057761, 1175290, 1410348, 1762935, 2115522, 2350580, 3525870, 4231044, 5288805, 7051740, 10577610, 21155220]

約数ペア:

[(1, 21155220), (2, 10577610), (3, 7051740), (4, 5288805), (5, 4231044), (6, 3525870), (9, 2350580), (10, 2115522), (12, 1762935), (15, 1410348), (18, 1175290), (20, 1057761), (30, 705174), (36, 587645), (45, 470116), (60, 352587), (90, 235058), (180, 117529)]