1388974420

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{978151}}^1$

素因数の和:978231

約数の個数: 24

約数和(自身を含む): 2957931648

約数和(自身を除く): 1568957228

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 978151, 1956302, 3912604, 4890755, 9781510, 19563020, 69448721, 138897442, 277794884, 347243605, 694487210, 1388974420]

約数ペア:

[(1, 1388974420), (2, 694487210), (4, 347243605), (5, 277794884), (10, 138897442), (20, 69448721), (71, 19563020), (142, 9781510), (284, 4890755), (355, 3912604), (710, 1956302), (1420, 978151)]