19910800

素因数分解:

$2^4\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{547}}^1$

素因数の和:585

約数の個数: 120

約数和(自身を含む): 58982336

約数和(自身を除く): 39071536

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 25, 26, 28, 35, 40, 50, 52, 56, 65, 70, 80, 91, 100, 104, 112, 130, 140, 175, 182, 200, 208, 260, 280, 325, 350, 364, 400, 455, 520, 547, 560, 650, 700, 728, 910, 1040, 1094, 1300, 1400, 1456, 1820, 2188, 2275, 2600, 2735, 2800, 3640, 3829, 4376, 4550, 5200, 5470, 7111, 7280, 7658, 8752, 9100, 10940, 13675, 14222, 15316, 18200, 19145, 21880, 27350, 28444, 30632, 35555, 36400, 38290, 43760, 49777, 54700, 56888, 61264, 71110, 76580, 95725, 99554, 109400, 113776, 142220, 153160, 177775, 191450, 199108, 218800, 248885, 284440, 306320, 355550, 382900, 398216, 497770, 568880, 711100, 765800, 796432, 995540, 1244425, 1422200, 1531600, 1991080, 2488850, 2844400, 3982160, 4977700, 9955400, 19910800]

約数ペア:

[(1, 19910800), (2, 9955400), (4, 4977700), (5, 3982160), (7, 2844400), (8, 2488850), (10, 1991080), (13, 1531600), (14, 1422200), (16, 1244425), (20, 995540), (25, 796432), (26, 765800), (28, 711100), (35, 568880), (40, 497770), (50, 398216), (52, 382900), (56, 355550), (65, 306320), (70, 284440), (80, 248885), (91, 218800), (100, 199108), (104, 191450), (112, 177775), (130, 153160), (140, 142220), (175, 113776), (182, 109400), (200, 99554), (208, 95725), (260, 76580), (280, 71110), (325, 61264), (350, 56888), (364, 54700), (400, 49777), (455, 43760), (520, 38290), (547, 36400), (560, 35555), (650, 30632), (700, 28444), (728, 27350), (910, 21880), (1040, 19145), (1094, 18200), (1300, 15316), (1400, 14222), (1456, 13675), (1820, 10940), (2188, 9100), (2275, 8752), (2600, 7658), (2735, 7280), (2800, 7111), (3640, 5470), (3829, 5200), (4376, 4550)]