19496240

素因数分解:

$2^4\times 5^1\times {\mathrm{243703}}^1$

素因数の和:243716

約数の個数: 20

約数和(自身を含む): 45328944

約数和(自身を除く): 25832704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 243703, 487406, 974812, 1218515, 1949624, 2437030, 3899248, 4874060, 9748120, 19496240]

約数ペア:

[(1, 19496240), (2, 9748120), (4, 4874060), (5, 3899248), (8, 2437030), (10, 1949624), (16, 1218515), (20, 974812), (40, 487406), (80, 243703)]