21059180

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11831}}^1$

素因数の和:11929

約数の個数: 24

約数和(自身を含む): 44724960

約数和(自身を除く): 23665780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11831, 23662, 47324, 59155, 118310, 236620, 1052959, 2105918, 4211836, 5264795, 10529590, 21059180]

約数ペア:

[(1, 21059180), (2, 10529590), (4, 5264795), (5, 4211836), (10, 2105918), (20, 1052959), (89, 236620), (178, 118310), (356, 59155), (445, 47324), (890, 23662), (1780, 11831)]