20127940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1319}}^1$

素因数の和:1444

約数の個数: 48

約数和(自身を含む): 48787200

約数和(自身を除く): 28659260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 218, 436, 545, 763, 1090, 1319, 1526, 2180, 2638, 3052, 3815, 5276, 6595, 7630, 9233, 13190, 15260, 18466, 26380, 36932, 46165, 92330, 143771, 184660, 287542, 575084, 718855, 1006397, 1437710, 2012794, 2875420, 4025588, 5031985, 10063970, 20127940]

約数ペア:

[(1, 20127940), (2, 10063970), (4, 5031985), (5, 4025588), (7, 2875420), (10, 2012794), (14, 1437710), (20, 1006397), (28, 718855), (35, 575084), (70, 287542), (109, 184660), (140, 143771), (218, 92330), (436, 46165), (545, 36932), (763, 26380), (1090, 18466), (1319, 15260), (1526, 13190), (2180, 9233), (2638, 7630), (3052, 6595), (3815, 5276)]