21213735

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19919}}^1$

素因数の和:19998

約数の個数: 16

約数和(自身を含む): 34421760

約数和(自身を除く): 13208025

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19919, 59757, 99595, 298785, 1414249, 4242747, 7071245, 21213735]

約数ペア:

[(1, 21213735), (3, 7071245), (5, 4242747), (15, 1414249), (71, 298785), (213, 99595), (355, 59757), (1065, 19919)]