20409040

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{463}}^1$

素因数の和:524

約数の個数: 80

約数和(自身を含む): 51782400

約数和(自身を除く): 31373360

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 29, 38, 40, 58, 76, 80, 95, 116, 145, 152, 190, 232, 290, 304, 380, 463, 464, 551, 580, 760, 926, 1102, 1160, 1520, 1852, 2204, 2315, 2320, 2755, 3704, 4408, 4630, 5510, 7408, 8797, 8816, 9260, 11020, 13427, 17594, 18520, 22040, 26854, 35188, 37040, 43985, 44080, 53708, 67135, 70376, 87970, 107416, 134270, 140752, 175940, 214832, 255113, 268540, 351880, 510226, 537080, 703760, 1020452, 1074160, 1275565, 2040904, 2551130, 4081808, 5102260, 10204520, 20409040]

約数ペア:

[(1, 20409040), (2, 10204520), (4, 5102260), (5, 4081808), (8, 2551130), (10, 2040904), (16, 1275565), (19, 1074160), (20, 1020452), (29, 703760), (38, 537080), (40, 510226), (58, 351880), (76, 268540), (80, 255113), (95, 214832), (116, 175940), (145, 140752), (152, 134270), (190, 107416), (232, 87970), (290, 70376), (304, 67135), (380, 53708), (463, 44080), (464, 43985), (551, 37040), (580, 35188), (760, 26854), (926, 22040), (1102, 18520), (1160, 17594), (1520, 13427), (1852, 11020), (2204, 9260), (2315, 8816), (2320, 8797), (2755, 7408), (3704, 5510), (4408, 4630)]