21981537

素因数分解:

$3^7\times {\mathrm{19}}^1\times {\mathrm{23}}^2$

素因数の和:86

約数の個数: 48

約数和(自身を含む): 36276800

約数和(自身を除く): 14295263

約数列:

[1, 3, 9, 19, 23, 27, 57, 69, 81, 171, 207, 243, 437, 513, 529, 621, 729, 1311, 1539, 1587, 1863, 2187, 3933, 4617, 4761, 5589, 10051, 11799, 13851, 14283, 16767, 30153, 35397, 41553, 42849, 50301, 90459, 106191, 128547, 271377, 318573, 385641, 814131, 955719, 1156923, 2442393, 7327179, 21981537]

約数ペア:

[(1, 21981537), (3, 7327179), (9, 2442393), (19, 1156923), (23, 955719), (27, 814131), (57, 385641), (69, 318573), (81, 271377), (171, 128547), (207, 106191), (243, 90459), (437, 50301), (513, 42849), (529, 41553), (621, 35397), (729, 30153), (1311, 16767), (1539, 14283), (1587, 13851), (1863, 11799), (2187, 10051), (3933, 5589), (4617, 4761)]