281490280

素因数分解:

$2^3\times 5^1\times {\mathrm{1951}}^1\times {\mathrm{3607}}^1$

素因数の和:5569

約数の個数: 32

約数和(自身を含む): 633853440

約数和(自身を除く): 352363160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1951, 3607, 3902, 7214, 7804, 9755, 14428, 15608, 18035, 19510, 28856, 36070, 39020, 72140, 78040, 144280, 7037257, 14074514, 28149028, 35186285, 56298056, 70372570, 140745140, 281490280]

約数ペア:

[(1, 281490280), (2, 140745140), (4, 70372570), (5, 56298056), (8, 35186285), (10, 28149028), (20, 14074514), (40, 7037257), (1951, 144280), (3607, 78040), (3902, 72140), (7214, 39020), (7804, 36070), (9755, 28856), (14428, 19510), (15608, 18035)]