20637800

素因数分解:

$2^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{5431}}^1$

素因数の和:5466

約数の個数: 48

約数和(自身を含む): 50517600

約数和(自身を除く): 29879800

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 152, 190, 200, 380, 475, 760, 950, 1900, 3800, 5431, 10862, 21724, 27155, 43448, 54310, 103189, 108620, 135775, 206378, 217240, 271550, 412756, 515945, 543100, 825512, 1031890, 1086200, 2063780, 2579725, 4127560, 5159450, 10318900, 20637800]

約数ペア:

[(1, 20637800), (2, 10318900), (4, 5159450), (5, 4127560), (8, 2579725), (10, 2063780), (19, 1086200), (20, 1031890), (25, 825512), (38, 543100), (40, 515945), (50, 412756), (76, 271550), (95, 217240), (100, 206378), (152, 135775), (190, 108620), (200, 103189), (380, 54310), (475, 43448), (760, 27155), (950, 21724), (1900, 10862), (3800, 5431)]