145420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{661}}^1$

素因数の和:681

約数の個数: 24

約数和(自身を含む): 333648

約数和(自身を除く): 188228

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 661, 1322, 2644, 3305, 6610, 7271, 13220, 14542, 29084, 36355, 72710, 145420]

約数ペア:

[(1, 145420), (2, 72710), (4, 36355), (5, 29084), (10, 14542), (11, 13220), (20, 7271), (22, 6610), (44, 3305), (55, 2644), (110, 1322), (220, 661)]