18340790

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{193}}^1$

素因数の和:273

約数の個数: 64

約数和(自身を含む): 38719296

約数和(自身を除く): 20378506

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 43, 65, 85, 86, 130, 170, 193, 215, 221, 386, 430, 442, 559, 731, 965, 1105, 1118, 1462, 1930, 2210, 2509, 2795, 3281, 3655, 5018, 5590, 6562, 7310, 8299, 9503, 12545, 16405, 16598, 19006, 25090, 32810, 41495, 42653, 47515, 82990, 85306, 95030, 107887, 141083, 213265, 215774, 282166, 426530, 539435, 705415, 1078870, 1410830, 1834079, 3668158, 9170395, 18340790]

約数ペア:

[(1, 18340790), (2, 9170395), (5, 3668158), (10, 1834079), (13, 1410830), (17, 1078870), (26, 705415), (34, 539435), (43, 426530), (65, 282166), (85, 215774), (86, 213265), (130, 141083), (170, 107887), (193, 95030), (215, 85306), (221, 82990), (386, 47515), (430, 42653), (442, 41495), (559, 32810), (731, 25090), (965, 19006), (1105, 16598), (1118, 16405), (1462, 12545), (1930, 9503), (2210, 8299), (2509, 7310), (2795, 6562), (3281, 5590), (3655, 5018)]