20781044560

素因数分解:

$2^4\times 5^1\times {\mathrm{593}}^1\times {\mathrm{438049}}^1$

素因数の和:438655

約数の個数: 40

約数和(自身を含む): 48397516200

約数和(自身を除く): 27616471640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 593, 1186, 2372, 2965, 4744, 5930, 9488, 11860, 23720, 47440, 438049, 876098, 1752196, 2190245, 3504392, 4380490, 7008784, 8760980, 17521960, 35043920, 259763057, 519526114, 1039052228, 1298815285, 2078104456, 2597630570, 4156208912, 5195261140, 10390522280, 20781044560]

約数ペア:

[(1, 20781044560), (2, 10390522280), (4, 5195261140), (5, 4156208912), (8, 2597630570), (10, 2078104456), (16, 1298815285), (20, 1039052228), (40, 519526114), (80, 259763057), (593, 35043920), (1186, 17521960), (2372, 8760980), (2965, 7008784), (4744, 4380490), (5930, 3504392), (9488, 2190245), (11860, 1752196), (23720, 876098), (47440, 438049)]