278318180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{1987987}}^1$

素因数の和:1988003

約数の個数: 24

約数和(自身を含む): 667963968

約数和(自身を除く): 389645788

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 1987987, 3975974, 7951948, 9939935, 13915909, 19879870, 27831818, 39759740, 55663636, 69579545, 139159090, 278318180]

約数ペア:

[(1, 278318180), (2, 139159090), (4, 69579545), (5, 55663636), (7, 39759740), (10, 27831818), (14, 19879870), (20, 13915909), (28, 9939935), (35, 7951948), (70, 3975974), (140, 1987987)]