18401960

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2063}}^1$

素因数の和:2297

約数の個数: 32

約数和(自身を含む): 41610240

約数和(自身を除く): 23208280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2063, 2230, 4126, 4460, 8252, 8920, 10315, 16504, 20630, 41260, 82520, 460049, 920098, 1840196, 2300245, 3680392, 4600490, 9200980, 18401960]

約数ペア:

[(1, 18401960), (2, 9200980), (4, 4600490), (5, 3680392), (8, 2300245), (10, 1840196), (20, 920098), (40, 460049), (223, 82520), (446, 41260), (892, 20630), (1115, 16504), (1784, 10315), (2063, 8920), (2230, 8252), (4126, 4460)]