81423251

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 110545344

約数和(自身を除く): 29122093

約数列:

[1, 7, 13, 17, 49, 73, 91, 103, 119, 221, 511, 637, 721, 833, 949, 1241, 1339, 1547, 1751, 3577, 5047, 6643, 7519, 8687, 9373, 10829, 12257, 16133, 22763, 46501, 52633, 60809, 65611, 85799, 97747, 112931, 127823, 159341, 368431, 684229, 790517, 894761, 1115387, 1661699, 4789603, 6263327, 11631893, 81423251]

約数ペア:

[(1, 81423251), (7, 11631893), (13, 6263327), (17, 4789603), (49, 1661699), (73, 1115387), (91, 894761), (103, 790517), (119, 684229), (221, 368431), (511, 159341), (637, 127823), (721, 112931), (833, 97747), (949, 85799), (1241, 65611), (1339, 60809), (1547, 52633), (1751, 46501), (3577, 22763), (5047, 16133), (6643, 12257), (7519, 10829), (8687, 9373)]