21187641

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{331}}^1\times {\mathrm{1123}}^1$

素因数の和:1476

約数の個数: 16

約数和(自身を含む): 29853440

約数和(自身を除く): 8665799

約数列:

[1, 3, 19, 57, 331, 993, 1123, 3369, 6289, 18867, 21337, 64011, 371713, 1115139, 7062547, 21187641]

約数ペア:

[(1, 21187641), (3, 7062547), (19, 1115139), (57, 371713), (331, 64011), (993, 21337), (1123, 18867), (3369, 6289)]