21810916

素因数分解:

$2^2\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{1259}}^1$

素因数の和:1395

約数の個数: 24

約数和(自身を含む): 39372480

約数和(自身を除く): 17561564

約数列:

[1, 2, 4, 61, 71, 122, 142, 244, 284, 1259, 2518, 4331, 5036, 8662, 17324, 76799, 89389, 153598, 178778, 307196, 357556, 5452729, 10905458, 21810916]

約数ペア:

[(1, 21810916), (2, 10905458), (4, 5452729), (61, 357556), (71, 307196), (122, 178778), (142, 153598), (244, 89389), (284, 76799), (1259, 17324), (2518, 8662), (4331, 5036)]