81158675

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 114576000

約数和(自身を除く): 33417325

約数列:

[1, 5, 13, 25, 29, 65, 79, 109, 145, 325, 377, 395, 545, 725, 1027, 1417, 1885, 1975, 2291, 2725, 3161, 5135, 7085, 8611, 9425, 11455, 15805, 25675, 29783, 35425, 41093, 43055, 57275, 79025, 111943, 148915, 205465, 215275, 249719, 559715, 744575, 1027325, 1248595, 2798575, 3246347, 6242975, 16231735, 81158675]

約数ペア:

[(1, 81158675), (5, 16231735), (13, 6242975), (25, 3246347), (29, 2798575), (65, 1248595), (79, 1027325), (109, 744575), (145, 559715), (325, 249719), (377, 215275), (395, 205465), (545, 148915), (725, 111943), (1027, 79025), (1417, 57275), (1885, 43055), (1975, 41093), (2291, 35425), (2725, 29783), (3161, 25675), (5135, 15805), (7085, 11455), (8611, 9425)]