72152720

素因数分解:

$2^4\times 5^1\times {\mathrm{901909}}^1$

素因数の和:901922

約数の個数: 20

約数和(自身を含む): 167755260

約数和(自身を除く): 95602540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 901909, 1803818, 3607636, 4509545, 7215272, 9019090, 14430544, 18038180, 36076360, 72152720]

約数ペア:

[(1, 72152720), (2, 36076360), (4, 18038180), (5, 14430544), (8, 9019090), (10, 7215272), (16, 4509545), (20, 3607636), (40, 1803818), (80, 901909)]