81208540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{2311}}^1$

素因数の和:2578

約数の個数: 48

約数和(自身を含む): 195761664

約数和(自身を除く): 114553124

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 251, 502, 1004, 1255, 1757, 2311, 2510, 3514, 4622, 5020, 7028, 8785, 9244, 11555, 16177, 17570, 23110, 32354, 35140, 46220, 64708, 80885, 161770, 323540, 580061, 1160122, 2320244, 2900305, 4060427, 5800610, 8120854, 11601220, 16241708, 20302135, 40604270, 81208540]

約数ペア:

[(1, 81208540), (2, 40604270), (4, 20302135), (5, 16241708), (7, 11601220), (10, 8120854), (14, 5800610), (20, 4060427), (28, 2900305), (35, 2320244), (70, 1160122), (140, 580061), (251, 323540), (502, 161770), (1004, 80885), (1255, 64708), (1757, 46220), (2311, 35140), (2510, 32354), (3514, 23110), (4622, 17570), (5020, 16177), (7028, 11555), (8785, 9244)]