21000895000

素因数分解:

$2^3\times 5^4\times {\mathrm{743}}^1\times {\mathrm{5653}}^1$

素因数の和:6422

約数の個数: 80

約数和(自身を含む): 49280037840

約数和(自身を除く): 28279142840

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 743, 1000, 1250, 1486, 2500, 2972, 3715, 5000, 5653, 5944, 7430, 11306, 14860, 18575, 22612, 28265, 29720, 37150, 45224, 56530, 74300, 92875, 113060, 141325, 148600, 185750, 226120, 282650, 371500, 464375, 565300, 706625, 743000, 928750, 1130600, 1413250, 1857500, 2826500, 3533125, 3715000, 4200179, 5653000, 7066250, 8400358, 14132500, 16800716, 21000895, 28265000, 33601432, 42001790, 84003580, 105004475, 168007160, 210008950, 420017900, 525022375, 840035800, 1050044750, 2100089500, 2625111875, 4200179000, 5250223750, 10500447500, 21000895000]

約数ペア:

[(1, 21000895000), (2, 10500447500), (4, 5250223750), (5, 4200179000), (8, 2625111875), (10, 2100089500), (20, 1050044750), (25, 840035800), (40, 525022375), (50, 420017900), (100, 210008950), (125, 168007160), (200, 105004475), (250, 84003580), (500, 42001790), (625, 33601432), (743, 28265000), (1000, 21000895), (1250, 16800716), (1486, 14132500), (2500, 8400358), (2972, 7066250), (3715, 5653000), (5000, 4200179), (5653, 3715000), (5944, 3533125), (7430, 2826500), (11306, 1857500), (14860, 1413250), (18575, 1130600), (22612, 928750), (28265, 743000), (29720, 706625), (37150, 565300), (45224, 464375), (56530, 371500), (74300, 282650), (92875, 226120), (113060, 185750), (141325, 148600)]