20123691800

素因数分解:

$2^3\times 5^2\times {\mathrm{397}}^1\times {\mathrm{253447}}^1$

素因数の和:253860

約数の個数: 48

約数和(自身を含む): 46905621360

約数和(自身を除く): 26781929560

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 397, 794, 1588, 1985, 3176, 3970, 7940, 9925, 15880, 19850, 39700, 79400, 253447, 506894, 1013788, 1267235, 2027576, 2534470, 5068940, 6336175, 10137880, 12672350, 25344700, 50689400, 100618459, 201236918, 402473836, 503092295, 804947672, 1006184590, 2012369180, 2515461475, 4024738360, 5030922950, 10061845900, 20123691800]

約数ペア:

[(1, 20123691800), (2, 10061845900), (4, 5030922950), (5, 4024738360), (8, 2515461475), (10, 2012369180), (20, 1006184590), (25, 804947672), (40, 503092295), (50, 402473836), (100, 201236918), (200, 100618459), (397, 50689400), (794, 25344700), (1588, 12672350), (1985, 10137880), (3176, 6336175), (3970, 5068940), (7940, 2534470), (9925, 2027576), (15880, 1267235), (19850, 1013788), (39700, 506894), (79400, 253447)]