81562740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{194197}}^1$

素因数の和:194216

約数の個数: 48

約数和(自身を含む): 261002112

約数和(自身を除く): 179439372

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 194197, 388394, 582591, 776788, 970985, 1165182, 1359379, 1941970, 2330364, 2718758, 2912955, 3883940, 4078137, 5437516, 5825910, 6796895, 8156274, 11651820, 13593790, 16312548, 20390685, 27187580, 40781370, 81562740]

約数ペア:

[(1, 81562740), (2, 40781370), (3, 27187580), (4, 20390685), (5, 16312548), (6, 13593790), (7, 11651820), (10, 8156274), (12, 6796895), (14, 5825910), (15, 5437516), (20, 4078137), (21, 3883940), (28, 2912955), (30, 2718758), (35, 2330364), (42, 1941970), (60, 1359379), (70, 1165182), (84, 970985), (105, 776788), (140, 582591), (210, 388394), (420, 194197)]