21991208

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{971}}^1$

素因数の和:1145

約数の個数: 32

約数和(自身を含む): 43740000

約数和(自身を除く): 21748792

約数列:

[1, 2, 4, 8, 19, 38, 76, 149, 152, 298, 596, 971, 1192, 1942, 2831, 3884, 5662, 7768, 11324, 18449, 22648, 36898, 73796, 144679, 147592, 289358, 578716, 1157432, 2748901, 5497802, 10995604, 21991208]

約数ペア:

[(1, 21991208), (2, 10995604), (4, 5497802), (8, 2748901), (19, 1157432), (38, 578716), (76, 289358), (149, 147592), (152, 144679), (298, 73796), (596, 36898), (971, 22648), (1192, 18449), (1942, 11324), (2831, 7768), (3884, 5662)]