20806900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{233}}^1$

素因数の和:313

約数の個数: 72

約数和(自身を含む): 48746880

約数和(自身を除く): 27939980

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 47, 50, 76, 94, 95, 100, 188, 190, 233, 235, 380, 466, 470, 475, 893, 932, 940, 950, 1165, 1175, 1786, 1900, 2330, 2350, 3572, 4427, 4465, 4660, 4700, 5825, 8854, 8930, 10951, 11650, 17708, 17860, 21902, 22135, 22325, 23300, 43804, 44270, 44650, 54755, 88540, 89300, 109510, 110675, 208069, 219020, 221350, 273775, 416138, 442700, 547550, 832276, 1040345, 1095100, 2080690, 4161380, 5201725, 10403450, 20806900]

約数ペア:

[(1, 20806900), (2, 10403450), (4, 5201725), (5, 4161380), (10, 2080690), (19, 1095100), (20, 1040345), (25, 832276), (38, 547550), (47, 442700), (50, 416138), (76, 273775), (94, 221350), (95, 219020), (100, 208069), (188, 110675), (190, 109510), (233, 89300), (235, 88540), (380, 54755), (466, 44650), (470, 44270), (475, 43804), (893, 23300), (932, 22325), (940, 22135), (950, 21902), (1165, 17860), (1175, 17708), (1786, 11650), (1900, 10951), (2330, 8930), (2350, 8854), (3572, 5825), (4427, 4700), (4465, 4660)]