21019660

素因数分解:

$2^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{3907}}^1$

素因数の和:4185

約数の個数: 24

約数和(自身を含む): 44316720

約数和(自身を除く): 23297060

約数列:

[1, 2, 4, 5, 10, 20, 269, 538, 1076, 1345, 2690, 3907, 5380, 7814, 15628, 19535, 39070, 78140, 1050983, 2101966, 4203932, 5254915, 10509830, 21019660]

約数ペア:

[(1, 21019660), (2, 10509830), (4, 5254915), (5, 4203932), (10, 2101966), (20, 1050983), (269, 78140), (538, 39070), (1076, 19535), (1345, 15628), (2690, 7814), (3907, 5380)]