21058750

素因数分解:

$2^1\times 5^4\times {\mathrm{17}}^1\times {\mathrm{991}}^1$

素因数の和:1030

約数の個数: 40

約数和(自身を含む): 41836608

約数和(自身を除く): 20777858

約数列:

[1, 2, 5, 10, 17, 25, 34, 50, 85, 125, 170, 250, 425, 625, 850, 991, 1250, 1982, 2125, 4250, 4955, 9910, 10625, 16847, 21250, 24775, 33694, 49550, 84235, 123875, 168470, 247750, 421175, 619375, 842350, 1238750, 2105875, 4211750, 10529375, 21058750]

約数ペア:

[(1, 21058750), (2, 10529375), (5, 4211750), (10, 2105875), (17, 1238750), (25, 842350), (34, 619375), (50, 421175), (85, 247750), (125, 168470), (170, 123875), (250, 84235), (425, 49550), (625, 33694), (850, 24775), (991, 21250), (1250, 16847), (1982, 10625), (2125, 9910), (4250, 4955)]