81859520

素因数分解:

$2^6\times 5^1\times {\mathrm{491}}^1\times {\mathrm{521}}^1$

素因数の和:1029

約数の個数: 56

約数和(自身を含む): 195699888

約数和(自身を除く): 113840368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 491, 521, 982, 1042, 1964, 2084, 2455, 2605, 3928, 4168, 4910, 5210, 7856, 8336, 9820, 10420, 15712, 16672, 19640, 20840, 31424, 33344, 39280, 41680, 78560, 83360, 157120, 166720, 255811, 511622, 1023244, 1279055, 2046488, 2558110, 4092976, 5116220, 8185952, 10232440, 16371904, 20464880, 40929760, 81859520]

約数ペア:

[(1, 81859520), (2, 40929760), (4, 20464880), (5, 16371904), (8, 10232440), (10, 8185952), (16, 5116220), (20, 4092976), (32, 2558110), (40, 2046488), (64, 1279055), (80, 1023244), (160, 511622), (320, 255811), (491, 166720), (521, 157120), (982, 83360), (1042, 78560), (1964, 41680), (2084, 39280), (2455, 33344), (2605, 31424), (3928, 20840), (4168, 19640), (4910, 16672), (5210, 15712), (7856, 10420), (8336, 9820)]