20405820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{239}}^1\times {\mathrm{1423}}^1$

素因数の和:1674

約数の個数: 48

約数和(自身を含む): 57415680

約数和(自身を除く): 37009860

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 239, 478, 717, 956, 1195, 1423, 1434, 2390, 2846, 2868, 3585, 4269, 4780, 5692, 7115, 7170, 8538, 14230, 14340, 17076, 21345, 28460, 42690, 85380, 340097, 680194, 1020291, 1360388, 1700485, 2040582, 3400970, 4081164, 5101455, 6801940, 10202910, 20405820]

約数ペア:

[(1, 20405820), (2, 10202910), (3, 6801940), (4, 5101455), (5, 4081164), (6, 3400970), (10, 2040582), (12, 1700485), (15, 1360388), (20, 1020291), (30, 680194), (60, 340097), (239, 85380), (478, 42690), (717, 28460), (956, 21345), (1195, 17076), (1423, 14340), (1434, 14230), (2390, 8538), (2846, 7170), (2868, 7115), (3585, 5692), (4269, 4780)]