21394960

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8627}}^1$

素因数の和:8671

約数の個数: 40

約数和(自身を含む): 51353856

約数和(自身を除く): 29958896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8627, 17254, 34508, 43135, 69016, 86270, 138032, 172540, 267437, 345080, 534874, 690160, 1069748, 1337185, 2139496, 2674370, 4278992, 5348740, 10697480, 21394960]

約数ペア:

[(1, 21394960), (2, 10697480), (4, 5348740), (5, 4278992), (8, 2674370), (10, 2139496), (16, 1337185), (20, 1069748), (31, 690160), (40, 534874), (62, 345080), (80, 267437), (124, 172540), (155, 138032), (248, 86270), (310, 69016), (496, 43135), (620, 34508), (1240, 17254), (2480, 8627)]