7821220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{487}}^1$

素因数の和:580

約数の個数: 48

約数和(自身を含む): 18200448

約数和(自身を除く): 10379228

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 73, 110, 146, 220, 292, 365, 487, 730, 803, 974, 1460, 1606, 1948, 2435, 3212, 4015, 4870, 5357, 8030, 9740, 10714, 16060, 21428, 26785, 35551, 53570, 71102, 107140, 142204, 177755, 355510, 391061, 711020, 782122, 1564244, 1955305, 3910610, 7821220]

約数ペア:

[(1, 7821220), (2, 3910610), (4, 1955305), (5, 1564244), (10, 782122), (11, 711020), (20, 391061), (22, 355510), (44, 177755), (55, 142204), (73, 107140), (110, 71102), (146, 53570), (220, 35551), (292, 26785), (365, 21428), (487, 16060), (730, 10714), (803, 9740), (974, 8030), (1460, 5357), (1606, 4870), (1948, 4015), (2435, 3212)]