81118640

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{23581}}^1$

素因数の和:23637

約数の個数: 40

約数和(自身を含む): 192995088

約数和(自身を除く): 111876448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 23581, 47162, 94324, 117905, 188648, 235810, 377296, 471620, 943240, 1013983, 1886480, 2027966, 4055932, 5069915, 8111864, 10139830, 16223728, 20279660, 40559320, 81118640]

約数ペア:

[(1, 81118640), (2, 40559320), (4, 20279660), (5, 16223728), (8, 10139830), (10, 8111864), (16, 5069915), (20, 4055932), (40, 2027966), (43, 1886480), (80, 1013983), (86, 943240), (172, 471620), (215, 377296), (344, 235810), (430, 188648), (688, 117905), (860, 94324), (1720, 47162), (3440, 23581)]