18917199

素因数分解:

$3^3\times 7^1\times {\mathrm{101}}^1\times {\mathrm{991}}^1$

素因数の和:1108

約数の個数: 32

約数和(自身を含む): 32378880

約数和(自身を除く): 13461681

約数列:

[1, 3, 7, 9, 21, 27, 63, 101, 189, 303, 707, 909, 991, 2121, 2727, 2973, 6363, 6937, 8919, 19089, 20811, 26757, 62433, 100091, 187299, 300273, 700637, 900819, 2101911, 2702457, 6305733, 18917199]

約数ペア:

[(1, 18917199), (3, 6305733), (7, 2702457), (9, 2101911), (21, 900819), (27, 700637), (63, 300273), (101, 187299), (189, 100091), (303, 62433), (707, 26757), (909, 20811), (991, 19089), (2121, 8919), (2727, 6937), (2973, 6363)]