21680254

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1$

素因数の和:328

約数の個数: 32

約数和(自身を含む): 35712000

約数和(自身を除く): 14031746

約数列:

[1, 2, 19, 38, 47, 61, 94, 122, 199, 398, 893, 1159, 1786, 2318, 2867, 3781, 5734, 7562, 9353, 12139, 18706, 24278, 54473, 108946, 177707, 230641, 355414, 461282, 570533, 1141066, 10840127, 21680254]

約数ペア:

[(1, 21680254), (2, 10840127), (19, 1141066), (38, 570533), (47, 461282), (61, 355414), (94, 230641), (122, 177707), (199, 108946), (398, 54473), (893, 24278), (1159, 18706), (1786, 12139), (2318, 9353), (2867, 7562), (3781, 5734)]