20315500

素因数分解:

$2^2\times 5^3\times {\mathrm{41}}^1\times {\mathrm{991}}^1$

素因数の和:1051

約数の個数: 48

約数和(自身を含む): 45497088

約数和(自身を除く): 25181588

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 125, 164, 205, 250, 410, 500, 820, 991, 1025, 1982, 2050, 3964, 4100, 4955, 5125, 9910, 10250, 19820, 20500, 24775, 40631, 49550, 81262, 99100, 123875, 162524, 203155, 247750, 406310, 495500, 812620, 1015775, 2031550, 4063100, 5078875, 10157750, 20315500]

約数ペア:

[(1, 20315500), (2, 10157750), (4, 5078875), (5, 4063100), (10, 2031550), (20, 1015775), (25, 812620), (41, 495500), (50, 406310), (82, 247750), (100, 203155), (125, 162524), (164, 123875), (205, 99100), (250, 81262), (410, 49550), (500, 40631), (820, 24775), (991, 20500), (1025, 19820), (1982, 10250), (2050, 9910), (3964, 5125), (4100, 4955)]