20202020

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{101}}^1\times {\mathrm{137}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 43748208

約数和(自身を除く): 23546188

約数列:

[1, 2, 4, 5, 10, 20, 73, 101, 137, 146, 202, 274, 292, 365, 404, 505, 548, 685, 730, 1010, 1370, 1460, 2020, 2740, 7373, 10001, 13837, 14746, 20002, 27674, 29492, 36865, 40004, 50005, 55348, 69185, 73730, 100010, 138370, 147460, 200020, 276740, 1010101, 2020202, 4040404, 5050505, 10101010, 20202020]

約数ペア:

[(1, 20202020), (2, 10101010), (4, 5050505), (5, 4040404), (10, 2020202), (20, 1010101), (73, 276740), (101, 200020), (137, 147460), (146, 138370), (202, 100010), (274, 73730), (292, 69185), (365, 55348), (404, 50005), (505, 40004), (548, 36865), (685, 29492), (730, 27674), (1010, 20002), (1370, 14746), (1460, 13837), (2020, 10001), (2740, 7373)]