19510000

素因数分解:

$2^4\times 5^4\times {\mathrm{1951}}^1$

素因数の和:1979

約数の個数: 50

約数和(自身を含む): 47259872

約数和(自身を除く): 27749872

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 1951, 2000, 2500, 3902, 5000, 7804, 9755, 10000, 15608, 19510, 31216, 39020, 48775, 78040, 97550, 156080, 195100, 243875, 390200, 487750, 780400, 975500, 1219375, 1951000, 2438750, 3902000, 4877500, 9755000, 19510000]

約数ペア:

[(1, 19510000), (2, 9755000), (4, 4877500), (5, 3902000), (8, 2438750), (10, 1951000), (16, 1219375), (20, 975500), (25, 780400), (40, 487750), (50, 390200), (80, 243875), (100, 195100), (125, 156080), (200, 97550), (250, 78040), (400, 48775), (500, 39020), (625, 31216), (1000, 19510), (1250, 15608), (1951, 10000), (2000, 9755), (2500, 7804), (3902, 5000)]