21326180

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11981}}^1$

素因数の和:12079

約数の個数: 24

約数和(自身を含む): 45291960

約数和(自身を除く): 23965780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11981, 23962, 47924, 59905, 119810, 239620, 1066309, 2132618, 4265236, 5331545, 10663090, 21326180]

約数ペア:

[(1, 21326180), (2, 10663090), (4, 5331545), (5, 4265236), (10, 2132618), (20, 1066309), (89, 239620), (178, 119810), (356, 59905), (445, 47924), (890, 23962), (1780, 11981)]