21994778

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{439}}^1$

素因数の和:542

約数の個数: 32

約数和(自身を含む): 37255680

約数和(自身を除く): 15260902

約数列:

[1, 2, 13, 26, 41, 47, 82, 94, 439, 533, 611, 878, 1066, 1222, 1927, 3854, 5707, 11414, 17999, 20633, 25051, 35998, 41266, 50102, 233987, 268229, 467974, 536458, 845953, 1691906, 10997389, 21994778]

約数ペア:

[(1, 21994778), (2, 10997389), (13, 1691906), (26, 845953), (41, 536458), (47, 467974), (82, 268229), (94, 233987), (439, 50102), (533, 41266), (611, 35998), (878, 25051), (1066, 20633), (1222, 17999), (1927, 11414), (3854, 5707)]