20985500

素因数分解:

$2^2\times 5^3\times {\mathrm{19}}^1\times {\mathrm{47}}^2$

素因数の和:132

約数の個数: 72

約数和(自身を含む): 49292880

約数和(自身を除く): 28307380

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 47, 50, 76, 94, 95, 100, 125, 188, 190, 235, 250, 380, 470, 475, 500, 893, 940, 950, 1175, 1786, 1900, 2209, 2350, 2375, 3572, 4418, 4465, 4700, 4750, 5875, 8836, 8930, 9500, 11045, 11750, 17860, 22090, 22325, 23500, 41971, 44180, 44650, 55225, 83942, 89300, 110450, 111625, 167884, 209855, 220900, 223250, 276125, 419710, 446500, 552250, 839420, 1049275, 1104500, 2098550, 4197100, 5246375, 10492750, 20985500]

約数ペア:

[(1, 20985500), (2, 10492750), (4, 5246375), (5, 4197100), (10, 2098550), (19, 1104500), (20, 1049275), (25, 839420), (38, 552250), (47, 446500), (50, 419710), (76, 276125), (94, 223250), (95, 220900), (100, 209855), (125, 167884), (188, 111625), (190, 110450), (235, 89300), (250, 83942), (380, 55225), (470, 44650), (475, 44180), (500, 41971), (893, 23500), (940, 22325), (950, 22090), (1175, 17860), (1786, 11750), (1900, 11045), (2209, 9500), (2350, 8930), (2375, 8836), (3572, 5875), (4418, 4750), (4465, 4700)]