81550120

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1\times {\mathrm{197}}^1$

素因数の和:418

約数の個数: 64

約数和(自身を含む): 188179200

約数和(自身を除く): 106629080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 131, 158, 197, 262, 316, 394, 395, 524, 632, 655, 788, 790, 985, 1048, 1310, 1576, 1580, 1970, 2620, 3160, 3940, 5240, 7880, 10349, 15563, 20698, 25807, 31126, 41396, 51614, 51745, 62252, 77815, 82792, 103228, 103490, 124504, 129035, 155630, 206456, 206980, 258070, 311260, 413960, 516140, 622520, 1032280, 2038753, 4077506, 8155012, 10193765, 16310024, 20387530, 40775060, 81550120]

約数ペア:

[(1, 81550120), (2, 40775060), (4, 20387530), (5, 16310024), (8, 10193765), (10, 8155012), (20, 4077506), (40, 2038753), (79, 1032280), (131, 622520), (158, 516140), (197, 413960), (262, 311260), (316, 258070), (394, 206980), (395, 206456), (524, 155630), (632, 129035), (655, 124504), (788, 103490), (790, 103228), (985, 82792), (1048, 77815), (1310, 62252), (1576, 51745), (1580, 51614), (1970, 41396), (2620, 31126), (3160, 25807), (3940, 20698), (5240, 15563), (7880, 10349)]