20087890

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{19889}}^1$

素因数の和:19997

約数の個数: 16

約数和(自身を含む): 36518040

約数和(自身を除く): 16430150

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 19889, 39778, 99445, 198890, 2008789, 4017578, 10043945, 20087890]

約数ペア:

[(1, 20087890), (2, 10043945), (5, 4017578), (10, 2008789), (101, 198890), (202, 99445), (505, 39778), (1010, 19889)]