19864720

素因数分解:

$2^4\times 5^1\times {\mathrm{248309}}^1$

素因数の和:248322

約数の個数: 20

約数和(自身を含む): 46185660

約数和(自身を除く): 26320940

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248309, 496618, 993236, 1241545, 1986472, 2483090, 3972944, 4966180, 9932360, 19864720]

約数ペア:

[(1, 19864720), (2, 9932360), (4, 4966180), (5, 3972944), (8, 2483090), (10, 1986472), (16, 1241545), (20, 993236), (40, 496618), (80, 248309)]