20495990

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89113}}^1$

素因数の和:89143

約数の個数: 16

約数和(自身を含む): 38497248

約数和(自身を除く): 18001258

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 89113, 178226, 445565, 891130, 2049599, 4099198, 10247995, 20495990]

約数ペア:

[(1, 20495990), (2, 10247995), (5, 4099198), (10, 2049599), (23, 891130), (46, 445565), (115, 178226), (230, 89113)]