18887180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72643}}^1$

素因数の和:72665

約数の個数: 24

約数和(自身を含む): 42714672

約数和(自身を除く): 23827492

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72643, 145286, 290572, 363215, 726430, 944359, 1452860, 1888718, 3777436, 4721795, 9443590, 18887180]

約数ペア:

[(1, 18887180), (2, 9443590), (4, 4721795), (5, 3777436), (10, 1888718), (13, 1452860), (20, 944359), (26, 726430), (52, 363215), (65, 290572), (130, 145286), (260, 72643)]