21492440

素因数分解:

$2^3\times 5^1\times {\mathrm{571}}^1\times {\mathrm{941}}^1$

素因数の和:1523

約数の個数: 32

約数和(自身を含む): 48494160

約数和(自身を除く): 27001720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 571, 941, 1142, 1882, 2284, 2855, 3764, 4568, 4705, 5710, 7528, 9410, 11420, 18820, 22840, 37640, 537311, 1074622, 2149244, 2686555, 4298488, 5373110, 10746220, 21492440]

約数ペア:

[(1, 21492440), (2, 10746220), (4, 5373110), (5, 4298488), (8, 2686555), (10, 2149244), (20, 1074622), (40, 537311), (571, 37640), (941, 22840), (1142, 18820), (1882, 11420), (2284, 9410), (2855, 7528), (3764, 5710), (4568, 4705)]