66456760

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{4271}}^1$

素因数の和:4671

約数の個数: 32

約数和(自身を含む): 149947200

約数和(自身を除く): 83490440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1556, 1945, 3112, 3890, 4271, 7780, 8542, 15560, 17084, 21355, 34168, 42710, 85420, 170840, 1661419, 3322838, 6645676, 8307095, 13291352, 16614190, 33228380, 66456760]

約数ペア:

[(1, 66456760), (2, 33228380), (4, 16614190), (5, 13291352), (8, 8307095), (10, 6645676), (20, 3322838), (40, 1661419), (389, 170840), (778, 85420), (1556, 42710), (1945, 34168), (3112, 21355), (3890, 17084), (4271, 15560), (7780, 8542)]