81562760

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{487}}^1$

素因数の和:630

約数の個数: 64

約数和(自身を含む): 189734400

約数和(自身を除く): 108171640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 79, 106, 158, 212, 265, 316, 395, 424, 487, 530, 632, 790, 974, 1060, 1580, 1948, 2120, 2435, 3160, 3896, 4187, 4870, 8374, 9740, 16748, 19480, 20935, 25811, 33496, 38473, 41870, 51622, 76946, 83740, 103244, 129055, 153892, 167480, 192365, 206488, 258110, 307784, 384730, 516220, 769460, 1032440, 1538920, 2039069, 4078138, 8156276, 10195345, 16312552, 20390690, 40781380, 81562760]

約数ペア:

[(1, 81562760), (2, 40781380), (4, 20390690), (5, 16312552), (8, 10195345), (10, 8156276), (20, 4078138), (40, 2039069), (53, 1538920), (79, 1032440), (106, 769460), (158, 516220), (212, 384730), (265, 307784), (316, 258110), (395, 206488), (424, 192365), (487, 167480), (530, 153892), (632, 129055), (790, 103244), (974, 83740), (1060, 76946), (1580, 51622), (1948, 41870), (2120, 38473), (2435, 33496), (3160, 25811), (3896, 20935), (4187, 19480), (4870, 16748), (8374, 9740)]