31185320

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{18131}}^1$

素因数の和:18185

約数の個数: 32

約数和(自身を含む): 71802720

約数和(自身を除く): 40617400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 18131, 36262, 72524, 90655, 145048, 181310, 362620, 725240, 779633, 1559266, 3118532, 3898165, 6237064, 7796330, 15592660, 31185320]

約数ペア:

[(1, 31185320), (2, 15592660), (4, 7796330), (5, 6237064), (8, 3898165), (10, 3118532), (20, 1559266), (40, 779633), (43, 725240), (86, 362620), (172, 181310), (215, 145048), (344, 90655), (430, 72524), (860, 36262), (1720, 18131)]