18856720

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{5749}}^1$

素因数の和:5803

約数の個数: 40

約数和(自身を含む): 44919000

約数和(自身を除く): 26062280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 5749, 11498, 22996, 28745, 45992, 57490, 91984, 114980, 229960, 235709, 459920, 471418, 942836, 1178545, 1885672, 2357090, 3771344, 4714180, 9428360, 18856720]

約数ペア:

[(1, 18856720), (2, 9428360), (4, 4714180), (5, 3771344), (8, 2357090), (10, 1885672), (16, 1178545), (20, 942836), (40, 471418), (41, 459920), (80, 235709), (82, 229960), (164, 114980), (205, 91984), (328, 57490), (410, 45992), (656, 28745), (820, 22996), (1640, 11498), (3280, 5749)]