18943280

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2213}}^1$

素因数の和:2333

約数の個数: 40

約数和(自身を含む): 44474832

約数和(自身を除く): 25531552

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2213, 4280, 4426, 8560, 8852, 11065, 17704, 22130, 35408, 44260, 88520, 177040, 236791, 473582, 947164, 1183955, 1894328, 2367910, 3788656, 4735820, 9471640, 18943280]

約数ペア:

[(1, 18943280), (2, 9471640), (4, 4735820), (5, 3788656), (8, 2367910), (10, 1894328), (16, 1183955), (20, 947164), (40, 473582), (80, 236791), (107, 177040), (214, 88520), (428, 44260), (535, 35408), (856, 22130), (1070, 17704), (1712, 11065), (2140, 8852), (2213, 8560), (4280, 4426)]