21379660

素因数分解:

$2^2\times 5^1\times {\mathrm{677}}^1\times {\mathrm{1579}}^1$

素因数の和:2265

約数の個数: 24

約数和(自身を含む): 44992080

約数和(自身を除く): 23612420

約数列:

[1, 2, 4, 5, 10, 20, 677, 1354, 1579, 2708, 3158, 3385, 6316, 6770, 7895, 13540, 15790, 31580, 1068983, 2137966, 4275932, 5344915, 10689830, 21379660]

約数ペア:

[(1, 21379660), (2, 10689830), (4, 5344915), (5, 4275932), (10, 2137966), (20, 1068983), (677, 31580), (1354, 15790), (1579, 13540), (2708, 7895), (3158, 6770), (3385, 6316)]