21091780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{34019}}^1$

素因数の和:34059

約数の個数: 24

約数和(自身を含む): 45722880

約数和(自身を除く): 24631100

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 34019, 68038, 136076, 170095, 340190, 680380, 1054589, 2109178, 4218356, 5272945, 10545890, 21091780]

約数ペア:

[(1, 21091780), (2, 10545890), (4, 5272945), (5, 4218356), (10, 2109178), (20, 1054589), (31, 680380), (62, 340190), (124, 170095), (155, 136076), (310, 68038), (620, 34019)]