81350980

素因数分解:

$2^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{15121}}^1$

素因数の和:15399

約数の個数: 24

約数和(自身を含む): 171483480

約数和(自身を除く): 90132500

約数列:

[1, 2, 4, 5, 10, 20, 269, 538, 1076, 1345, 2690, 5380, 15121, 30242, 60484, 75605, 151210, 302420, 4067549, 8135098, 16270196, 20337745, 40675490, 81350980]

約数ペア:

[(1, 81350980), (2, 40675490), (4, 20337745), (5, 16270196), (10, 8135098), (20, 4067549), (269, 302420), (538, 151210), (1076, 75605), (1345, 60484), (2690, 30242), (5380, 15121)]