19856240

素因数分解:

$2^4\times 5^1\times {\mathrm{248203}}^1$

素因数の和:248216

約数の個数: 20

約数和(自身を含む): 46165944

約数和(自身を除く): 26309704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248203, 496406, 992812, 1241015, 1985624, 2482030, 3971248, 4964060, 9928120, 19856240]

約数ペア:

[(1, 19856240), (2, 9928120), (4, 4964060), (5, 3971248), (8, 2482030), (10, 1985624), (16, 1241015), (20, 992812), (40, 496406), (80, 248203)]