18865340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72559}}^1$

素因数の和:72581

約数の個数: 24

約数和(自身を含む): 42665280

約数和(自身を除く): 23799940

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72559, 145118, 290236, 362795, 725590, 943267, 1451180, 1886534, 3773068, 4716335, 9432670, 18865340]

約数ペア:

[(1, 18865340), (2, 9432670), (4, 4716335), (5, 3773068), (10, 1886534), (13, 1451180), (20, 943267), (26, 725590), (52, 362795), (65, 290236), (130, 145118), (260, 72559)]