20101900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^2$

素因数の和:128

約数の個数: 108

約数和(自身を含む): 54854128

約数和(自身を除く): 34752228

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 25, 26, 28, 35, 47, 50, 52, 65, 70, 91, 94, 100, 130, 140, 175, 182, 188, 235, 260, 325, 329, 350, 364, 455, 470, 611, 650, 658, 700, 910, 940, 1175, 1222, 1300, 1316, 1645, 1820, 2209, 2275, 2350, 2444, 3055, 3290, 4277, 4418, 4550, 4700, 6110, 6580, 8225, 8554, 8836, 9100, 11045, 12220, 15275, 15463, 16450, 17108, 21385, 22090, 28717, 30550, 30926, 32900, 42770, 44180, 55225, 57434, 61100, 61852, 77315, 85540, 106925, 110450, 114868, 143585, 154630, 201019, 213850, 220900, 287170, 309260, 386575, 402038, 427700, 574340, 717925, 773150, 804076, 1005095, 1435850, 1546300, 2010190, 2871700, 4020380, 5025475, 10050950, 20101900]

約数ペア:

[(1, 20101900), (2, 10050950), (4, 5025475), (5, 4020380), (7, 2871700), (10, 2010190), (13, 1546300), (14, 1435850), (20, 1005095), (25, 804076), (26, 773150), (28, 717925), (35, 574340), (47, 427700), (50, 402038), (52, 386575), (65, 309260), (70, 287170), (91, 220900), (94, 213850), (100, 201019), (130, 154630), (140, 143585), (175, 114868), (182, 110450), (188, 106925), (235, 85540), (260, 77315), (325, 61852), (329, 61100), (350, 57434), (364, 55225), (455, 44180), (470, 42770), (611, 32900), (650, 30926), (658, 30550), (700, 28717), (910, 22090), (940, 21385), (1175, 17108), (1222, 16450), (1300, 15463), (1316, 15275), (1645, 12220), (1820, 11045), (2209, 9100), (2275, 8836), (2350, 8554), (2444, 8225), (3055, 6580), (3290, 6110), (4277, 4700), (4418, 4550)]