81284679

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:237

約数の個数: 72

約数和(自身を含む): 146718000

約数和(自身を除く): 65433321

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 89, 109, 133, 147, 171, 267, 327, 399, 441, 623, 763, 801, 931, 981, 1197, 1691, 1869, 2071, 2289, 2793, 4361, 5073, 5341, 5607, 6213, 6867, 8379, 9701, 11837, 13083, 14497, 15219, 16023, 18639, 29103, 35511, 39249, 43491, 48069, 67907, 82859, 87309, 101479, 106533, 130473, 184319, 203721, 248577, 304437, 475349, 552957, 611163, 745731, 913311, 1290233, 1426047, 1658871, 3870699, 4278141, 9031631, 11612097, 27094893, 81284679]

約数ペア:

[(1, 81284679), (3, 27094893), (7, 11612097), (9, 9031631), (19, 4278141), (21, 3870699), (49, 1658871), (57, 1426047), (63, 1290233), (89, 913311), (109, 745731), (133, 611163), (147, 552957), (171, 475349), (267, 304437), (327, 248577), (399, 203721), (441, 184319), (623, 130473), (763, 106533), (801, 101479), (931, 87309), (981, 82859), (1197, 67907), (1691, 48069), (1869, 43491), (2071, 39249), (2289, 35511), (2793, 29103), (4361, 18639), (5073, 16023), (5341, 15219), (5607, 14497), (6213, 13083), (6867, 11837), (8379, 9701)]