21401780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{34519}}^1$

素因数の和:34559

約数の個数: 24

約数和(自身を含む): 46394880

約数和(自身を除く): 24993100

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 34519, 69038, 138076, 172595, 345190, 690380, 1070089, 2140178, 4280356, 5350445, 10700890, 21401780]

約数ペア:

[(1, 21401780), (2, 10700890), (4, 5350445), (5, 4280356), (10, 2140178), (20, 1070089), (31, 690380), (62, 345190), (124, 172595), (155, 138076), (310, 69038), (620, 34519)]