18990620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{2333}}^1$

素因数の和:2390

約数の個数: 48

約数和(自身を含む): 44700768

約数和(自身を除く): 25710148

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 37, 44, 55, 74, 110, 148, 185, 220, 370, 407, 740, 814, 1628, 2035, 2333, 4070, 4666, 8140, 9332, 11665, 23330, 25663, 46660, 51326, 86321, 102652, 128315, 172642, 256630, 345284, 431605, 513260, 863210, 949531, 1726420, 1899062, 3798124, 4747655, 9495310, 18990620]

約数ペア:

[(1, 18990620), (2, 9495310), (4, 4747655), (5, 3798124), (10, 1899062), (11, 1726420), (20, 949531), (22, 863210), (37, 513260), (44, 431605), (55, 345284), (74, 256630), (110, 172642), (148, 128315), (185, 102652), (220, 86321), (370, 51326), (407, 46660), (740, 25663), (814, 23330), (1628, 11665), (2035, 9332), (2333, 8140), (4070, 4666)]