20397640

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{26839}}^1$

素因数の和:26869

約数の個数: 32

約数和(自身を含む): 48312000

約数和(自身を除く): 27914360

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 26839, 53678, 107356, 134195, 214712, 268390, 509941, 536780, 1019882, 1073560, 2039764, 2549705, 4079528, 5099410, 10198820, 20397640]

約数ペア:

[(1, 20397640), (2, 10198820), (4, 5099410), (5, 4079528), (8, 2549705), (10, 2039764), (19, 1073560), (20, 1019882), (38, 536780), (40, 509941), (76, 268390), (95, 214712), (152, 134195), (190, 107356), (380, 53678), (760, 26839)]