21031336

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{607}}^1$

素因数の和:745

約数の個数: 32

約数和(自身を含む): 40711680

約数和(自身を除く): 19680344

約数列:

[1, 2, 4, 8, 61, 71, 122, 142, 244, 284, 488, 568, 607, 1214, 2428, 4331, 4856, 8662, 17324, 34648, 37027, 43097, 74054, 86194, 148108, 172388, 296216, 344776, 2628917, 5257834, 10515668, 21031336]

約数ペア:

[(1, 21031336), (2, 10515668), (4, 5257834), (8, 2628917), (61, 344776), (71, 296216), (122, 172388), (142, 148108), (244, 86194), (284, 74054), (488, 43097), (568, 37027), (607, 34648), (1214, 17324), (2428, 8662), (4331, 4856)]