21857961

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{199}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 32256000

約数和(自身を除く): 10398039

約数列:

[1, 3, 19, 41, 47, 57, 123, 141, 199, 597, 779, 893, 1927, 2337, 2679, 3781, 5781, 8159, 9353, 11343, 24477, 28059, 36613, 109839, 155021, 177707, 383473, 465063, 533121, 1150419, 7285987, 21857961]

約数ペア:

[(1, 21857961), (3, 7285987), (19, 1150419), (41, 533121), (47, 465063), (57, 383473), (123, 177707), (141, 155021), (199, 109839), (597, 36613), (779, 28059), (893, 24477), (1927, 11343), (2337, 9353), (2679, 8159), (3781, 5781)]