8427140

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{239}}^1$

素因数の和:332

約数の個数: 48

約数和(自身を含む): 18627840

約数和(自身を除く): 10200700

約数列:

[1, 2, 4, 5, 10, 20, 41, 43, 82, 86, 164, 172, 205, 215, 239, 410, 430, 478, 820, 860, 956, 1195, 1763, 2390, 3526, 4780, 7052, 8815, 9799, 10277, 17630, 19598, 20554, 35260, 39196, 41108, 48995, 51385, 97990, 102770, 195980, 205540, 421357, 842714, 1685428, 2106785, 4213570, 8427140]

約数ペア:

[(1, 8427140), (2, 4213570), (4, 2106785), (5, 1685428), (10, 842714), (20, 421357), (41, 205540), (43, 195980), (82, 102770), (86, 97990), (164, 51385), (172, 48995), (205, 41108), (215, 39196), (239, 35260), (410, 20554), (430, 19598), (478, 17630), (820, 10277), (860, 9799), (956, 8815), (1195, 7052), (1763, 4780), (2390, 3526)]