21780396

素因数分解:

$2^2\times 3^2\times {\mathrm{11}}^1\times {\mathrm{55001}}^1$

素因数の和:55022

約数の個数: 36

約数和(自身を含む): 60062184

約数和(自身を除く): 38281788

約数列:

[1, 2, 3, 4, 6, 9, 11, 12, 18, 22, 33, 36, 44, 66, 99, 132, 198, 396, 55001, 110002, 165003, 220004, 330006, 495009, 605011, 660012, 990018, 1210022, 1815033, 1980036, 2420044, 3630066, 5445099, 7260132, 10890198, 21780396]

約数ペア:

[(1, 21780396), (2, 10890198), (3, 7260132), (4, 5445099), (6, 3630066), (9, 2420044), (11, 1980036), (12, 1815033), (18, 1210022), (22, 990018), (33, 660012), (36, 605011), (44, 495009), (66, 330006), (99, 220004), (132, 165003), (198, 110002), (396, 55001)]