21240968

素因数分解:

$2^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{8821}}^1$

素因数の和:8877

約数の個数: 32

約数和(自身を含む): 46580160

約数和(自身を除く): 25339192

約数列:

[1, 2, 4, 7, 8, 14, 28, 43, 56, 86, 172, 301, 344, 602, 1204, 2408, 8821, 17642, 35284, 61747, 70568, 123494, 246988, 379303, 493976, 758606, 1517212, 2655121, 3034424, 5310242, 10620484, 21240968]

約数ペア:

[(1, 21240968), (2, 10620484), (4, 5310242), (7, 3034424), (8, 2655121), (14, 1517212), (28, 758606), (43, 493976), (56, 379303), (86, 246988), (172, 123494), (301, 70568), (344, 61747), (602, 35284), (1204, 17642), (2408, 8821)]