19915640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16061}}^1$

素因数の和:16103

約数の個数: 32

約数和(自身を含む): 46258560

約数和(自身を除く): 26342920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16061, 32122, 64244, 80305, 128488, 160610, 321220, 497891, 642440, 995782, 1991564, 2489455, 3983128, 4978910, 9957820, 19915640]

約数ペア:

[(1, 19915640), (2, 9957820), (4, 4978910), (5, 3983128), (8, 2489455), (10, 1991564), (20, 995782), (31, 642440), (40, 497891), (62, 321220), (124, 160610), (155, 128488), (248, 80305), (310, 64244), (620, 32122), (1240, 16061)]