20515000

素因数分解:

$2^3\times 5^4\times {\mathrm{11}}^1\times {\mathrm{373}}^1$

素因数の和:410

約数の個数: 80

約数和(自身を含む): 52576920

約数和(自身を除く): 32061920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 100, 110, 125, 200, 220, 250, 275, 373, 440, 500, 550, 625, 746, 1000, 1100, 1250, 1375, 1492, 1865, 2200, 2500, 2750, 2984, 3730, 4103, 5000, 5500, 6875, 7460, 8206, 9325, 11000, 13750, 14920, 16412, 18650, 20515, 27500, 32824, 37300, 41030, 46625, 55000, 74600, 82060, 93250, 102575, 164120, 186500, 205150, 233125, 373000, 410300, 466250, 512875, 820600, 932500, 1025750, 1865000, 2051500, 2564375, 4103000, 5128750, 10257500, 20515000]

約数ペア:

[(1, 20515000), (2, 10257500), (4, 5128750), (5, 4103000), (8, 2564375), (10, 2051500), (11, 1865000), (20, 1025750), (22, 932500), (25, 820600), (40, 512875), (44, 466250), (50, 410300), (55, 373000), (88, 233125), (100, 205150), (110, 186500), (125, 164120), (200, 102575), (220, 93250), (250, 82060), (275, 74600), (373, 55000), (440, 46625), (500, 41030), (550, 37300), (625, 32824), (746, 27500), (1000, 20515), (1100, 18650), (1250, 16412), (1375, 14920), (1492, 13750), (1865, 11000), (2200, 9325), (2500, 8206), (2750, 7460), (2984, 6875), (3730, 5500), (4103, 5000)]