19895240

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^2\times {\mathrm{269}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 45999900

約数和(自身を除く): 26104660

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 269, 344, 430, 538, 860, 1076, 1345, 1720, 1849, 2152, 2690, 3698, 5380, 7396, 9245, 10760, 11567, 14792, 18490, 23134, 36980, 46268, 57835, 73960, 92536, 115670, 231340, 462680, 497381, 994762, 1989524, 2486905, 3979048, 4973810, 9947620, 19895240]

約数ペア:

[(1, 19895240), (2, 9947620), (4, 4973810), (5, 3979048), (8, 2486905), (10, 1989524), (20, 994762), (40, 497381), (43, 462680), (86, 231340), (172, 115670), (215, 92536), (269, 73960), (344, 57835), (430, 46268), (538, 36980), (860, 23134), (1076, 18490), (1345, 14792), (1720, 11567), (1849, 10760), (2152, 9245), (2690, 7396), (3698, 5380)]