20658820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11351}}^1$

素因数の和:11380

約数の個数: 48

約数和(自身を含む): 53399808

約数和(自身を除く): 32740988

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11351, 22702, 45404, 56755, 79457, 113510, 147563, 158914, 227020, 295126, 317828, 397285, 590252, 737815, 794570, 1032941, 1475630, 1589140, 2065882, 2951260, 4131764, 5164705, 10329410, 20658820]

約数ペア:

[(1, 20658820), (2, 10329410), (4, 5164705), (5, 4131764), (7, 2951260), (10, 2065882), (13, 1589140), (14, 1475630), (20, 1032941), (26, 794570), (28, 737815), (35, 590252), (52, 397285), (65, 317828), (70, 295126), (91, 227020), (130, 158914), (140, 147563), (182, 113510), (260, 79457), (364, 56755), (455, 45404), (910, 22702), (1820, 11351)]