20671518

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{677}}^1\times {\mathrm{727}}^1$

素因数の和:1416

約数の個数: 32

約数和(自身を含む): 47384064

約数和(自身を除く): 26712546

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 677, 727, 1354, 1454, 2031, 2181, 4062, 4362, 4739, 5089, 9478, 10178, 14217, 15267, 28434, 30534, 492179, 984358, 1476537, 2953074, 3445253, 6890506, 10335759, 20671518]

約数ペア:

[(1, 20671518), (2, 10335759), (3, 6890506), (6, 3445253), (7, 2953074), (14, 1476537), (21, 984358), (42, 492179), (677, 30534), (727, 28434), (1354, 15267), (1454, 14217), (2031, 10178), (2181, 9478), (4062, 5089), (4362, 4739)]