20118465

素因数分解:

$3^2\times 5^1\times {\mathrm{647}}^1\times {\mathrm{691}}^1$

素因数の和:1349

約数の個数: 24

約数和(自身を含む): 34976448

約数和(自身を除く): 14857983

約数列:

[1, 3, 5, 9, 15, 45, 647, 691, 1941, 2073, 3235, 3455, 5823, 6219, 9705, 10365, 29115, 31095, 447077, 1341231, 2235385, 4023693, 6706155, 20118465]

約数ペア:

[(1, 20118465), (3, 6706155), (5, 4023693), (9, 2235385), (15, 1341231), (45, 447077), (647, 31095), (691, 29115), (1941, 10365), (2073, 9705), (3235, 6219), (3455, 5823)]