81425820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{193871}}^1$

素因数の和:193890

約数の個数: 48

約数和(自身を含む): 260563968

約数和(自身を除く): 179138148

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, 193871, 387742, 581613, 775484, 969355, 1163226, 1357097, 1938710, 2326452, 2714194, 2908065, 3877420, 4071291, 5428388, 5816130, 6785485, 8142582, 11632260, 13570970, 16285164, 20356455, 27141940, 40712910, 81425820]

約数ペア:

[(1, 81425820), (2, 40712910), (3, 27141940), (4, 20356455), (5, 16285164), (6, 13570970), (7, 11632260), (10, 8142582), (12, 6785485), (14, 5816130), (15, 5428388), (20, 4071291), (21, 3877420), (28, 2908065), (30, 2714194), (35, 2326452), (42, 1938710), (60, 1357097), (70, 1163226), (84, 969355), (105, 775484), (140, 581613), (210, 387742), (420, 193871)]