21292271

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{239}}^1$

素因数の和:359

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7738129

約数列:

[1, 7, 11, 13, 77, 89, 91, 143, 239, 623, 979, 1001, 1157, 1673, 2629, 3107, 6853, 8099, 12727, 18403, 21271, 21749, 34177, 89089, 148897, 233981, 239239, 276523, 1637867, 1935661, 3041753, 21292271]

約数ペア:

[(1, 21292271), (7, 3041753), (11, 1935661), (13, 1637867), (77, 276523), (89, 239239), (91, 233981), (143, 148897), (239, 89089), (623, 34177), (979, 21749), (1001, 21271), (1157, 18403), (1673, 12727), (2629, 8099), (3107, 6853)]