20455780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53831}}^1$

素因数の和:53859

約数の個数: 24

約数和(自身を含む): 45218880

約数和(自身を除く): 24763100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 53831, 107662, 215324, 269155, 538310, 1022789, 1076620, 2045578, 4091156, 5113945, 10227890, 20455780]

約数ペア:

[(1, 20455780), (2, 10227890), (4, 5113945), (5, 4091156), (10, 2045578), (19, 1076620), (20, 1022789), (38, 538310), (76, 269155), (95, 215324), (190, 107662), (380, 53831)]