20269820

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12829}}^1$

素因数の和:12917

約数の個数: 24

約数和(自身を含む): 43108800

約数和(自身を除く): 22838980

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 12829, 25658, 51316, 64145, 128290, 256580, 1013491, 2026982, 4053964, 5067455, 10134910, 20269820]

約数ペア:

[(1, 20269820), (2, 10134910), (4, 5067455), (5, 4053964), (10, 2026982), (20, 1013491), (79, 256580), (158, 128290), (316, 64145), (395, 51316), (790, 25658), (1580, 12829)]