81387930

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{208687}}^1$

素因数の和:208710

約数の個数: 32

約数和(自身を含む): 210357504

約数和(自身を除く): 128969574

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 208687, 417374, 626061, 1043435, 1252122, 2086870, 2712931, 3130305, 5425862, 6260610, 8138793, 13564655, 16277586, 27129310, 40693965, 81387930]

約数ペア:

[(1, 81387930), (2, 40693965), (3, 27129310), (5, 16277586), (6, 13564655), (10, 8138793), (13, 6260610), (15, 5425862), (26, 3130305), (30, 2712931), (39, 2086870), (65, 1252122), (78, 1043435), (130, 626061), (195, 417374), (390, 208687)]