20395880

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{13781}}^1$

素因数の和:13829

約数の個数: 32

約数和(自身を含む): 47134440

約数和(自身を除く): 26738560

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 13781, 27562, 55124, 68905, 110248, 137810, 275620, 509897, 551240, 1019794, 2039588, 2549485, 4079176, 5098970, 10197940, 20395880]

約数ペア:

[(1, 20395880), (2, 10197940), (4, 5098970), (5, 4079176), (8, 2549485), (10, 2039588), (20, 1019794), (37, 551240), (40, 509897), (74, 275620), (148, 137810), (185, 110248), (296, 68905), (370, 55124), (740, 27562), (1480, 13781)]