18821480

素因数分解:

$2^3\times 5^1\times {\mathrm{419}}^1\times {\mathrm{1123}}^1$

素因数の和:1553

約数の個数: 32

約数和(自身を含む): 42487200

約数和(自身を除く): 23665720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 419, 838, 1123, 1676, 2095, 2246, 3352, 4190, 4492, 5615, 8380, 8984, 11230, 16760, 22460, 44920, 470537, 941074, 1882148, 2352685, 3764296, 4705370, 9410740, 18821480]

約数ペア:

[(1, 18821480), (2, 9410740), (4, 4705370), (5, 3764296), (8, 2352685), (10, 1882148), (20, 941074), (40, 470537), (419, 44920), (838, 22460), (1123, 16760), (1676, 11230), (2095, 8984), (2246, 8380), (3352, 5615), (4190, 4492)]