640278

素因数分解:

$2^1\times 3^3\times {\mathrm{71}}^1\times {\mathrm{167}}^1$

素因数の和:249

約数の個数: 32

約数和(自身を含む): 1451520

約数和(自身を除く): 811242

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 71, 142, 167, 213, 334, 426, 501, 639, 1002, 1278, 1503, 1917, 3006, 3834, 4509, 9018, 11857, 23714, 35571, 71142, 106713, 213426, 320139, 640278]

約数ペア:

[(1, 640278), (2, 320139), (3, 213426), (6, 106713), (9, 71142), (18, 35571), (27, 23714), (54, 11857), (71, 9018), (142, 4509), (167, 3834), (213, 3006), (334, 1917), (426, 1503), (501, 1278), (639, 1002)]