64503980

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{8291}}^1$

素因数の和:8689

約数の個数: 24

約数和(自身を含む): 135822960

約数和(自身を除く): 71318980

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890, 7780, 8291, 16582, 33164, 41455, 82910, 165820, 3225199, 6450398, 12900796, 16125995, 32251990, 64503980]

約数ペア:

[(1, 64503980), (2, 32251990), (4, 16125995), (5, 12900796), (10, 6450398), (20, 3225199), (389, 165820), (778, 82910), (1556, 41455), (1945, 33164), (3890, 16582), (7780, 8291)]