987140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{641}}^1$

素因数の和:668

約数の個数: 48

約数和(自身を含む): 2588544

約数和(自身を除く): 1601404

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 641, 770, 1282, 1540, 2564, 3205, 4487, 6410, 7051, 8974, 12820, 14102, 17948, 22435, 28204, 35255, 44870, 49357, 70510, 89740, 98714, 141020, 197428, 246785, 493570, 987140]

約数ペア:

[(1, 987140), (2, 493570), (4, 246785), (5, 197428), (7, 141020), (10, 98714), (11, 89740), (14, 70510), (20, 49357), (22, 44870), (28, 35255), (35, 28204), (44, 22435), (55, 17948), (70, 14102), (77, 12820), (110, 8974), (140, 7051), (154, 6410), (220, 4487), (308, 3205), (385, 2564), (641, 1540), (770, 1282)]