20657560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{353}}^1$

素因数の和:401

約数の個数: 128

約数和(自身を含む): 61171200

約数和(自身を除く): 40513640

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 19, 20, 22, 28, 35, 38, 40, 44, 55, 56, 70, 76, 77, 88, 95, 110, 133, 140, 152, 154, 190, 209, 220, 266, 280, 308, 353, 380, 385, 418, 440, 532, 616, 665, 706, 760, 770, 836, 1045, 1064, 1330, 1412, 1463, 1540, 1672, 1765, 2090, 2471, 2660, 2824, 2926, 3080, 3530, 3883, 4180, 4942, 5320, 5852, 6707, 7060, 7315, 7766, 8360, 9884, 11704, 12355, 13414, 14120, 14630, 15532, 19415, 19768, 24710, 26828, 27181, 29260, 31064, 33535, 38830, 46949, 49420, 53656, 54362, 58520, 67070, 73777, 77660, 93898, 98840, 108724, 134140, 135905, 147554, 155320, 187796, 217448, 234745, 268280, 271810, 295108, 368885, 375592, 469490, 516439, 543620, 590216, 737770, 938980, 1032878, 1087240, 1475540, 1877960, 2065756, 2582195, 2951080, 4131512, 5164390, 10328780, 20657560]

約数ペア:

[(1, 20657560), (2, 10328780), (4, 5164390), (5, 4131512), (7, 2951080), (8, 2582195), (10, 2065756), (11, 1877960), (14, 1475540), (19, 1087240), (20, 1032878), (22, 938980), (28, 737770), (35, 590216), (38, 543620), (40, 516439), (44, 469490), (55, 375592), (56, 368885), (70, 295108), (76, 271810), (77, 268280), (88, 234745), (95, 217448), (110, 187796), (133, 155320), (140, 147554), (152, 135905), (154, 134140), (190, 108724), (209, 98840), (220, 93898), (266, 77660), (280, 73777), (308, 67070), (353, 58520), (380, 54362), (385, 53656), (418, 49420), (440, 46949), (532, 38830), (616, 33535), (665, 31064), (706, 29260), (760, 27181), (770, 26828), (836, 24710), (1045, 19768), (1064, 19415), (1330, 15532), (1412, 14630), (1463, 14120), (1540, 13414), (1672, 12355), (1765, 11704), (2090, 9884), (2471, 8360), (2660, 7766), (2824, 7315), (2926, 7060), (3080, 6707), (3530, 5852), (3883, 5320), (4180, 4942)]