20372720

素因数分解:

$2^4\times 5^1\times {\mathrm{254659}}^1$

素因数の和:254672

約数の個数: 20

約数和(自身を含む): 47366760

約数和(自身を除く): 26994040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 254659, 509318, 1018636, 1273295, 2037272, 2546590, 4074544, 5093180, 10186360, 20372720]

約数ペア:

[(1, 20372720), (2, 10186360), (4, 5093180), (5, 4074544), (8, 2546590), (10, 2037272), (16, 1273295), (20, 1018636), (40, 509318), (80, 254659)]