20560540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{79}}^1$

素因数の和:132

約数の個数: 144

約数和(自身を含む): 59028480

約数和(自身を除く): 38467940

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 79, 91, 110, 130, 140, 143, 154, 158, 169, 182, 220, 260, 286, 308, 316, 338, 364, 385, 395, 455, 553, 572, 676, 715, 770, 790, 845, 869, 910, 1001, 1027, 1106, 1183, 1430, 1540, 1580, 1690, 1738, 1820, 1859, 2002, 2054, 2212, 2366, 2765, 2860, 3380, 3476, 3718, 4004, 4108, 4345, 4732, 5005, 5135, 5530, 5915, 6083, 7189, 7436, 8690, 9295, 10010, 10270, 11060, 11297, 11830, 12166, 13013, 13351, 14378, 17380, 18590, 20020, 20540, 22594, 23660, 24332, 26026, 26702, 28756, 30415, 35945, 37180, 45188, 52052, 53404, 56485, 60830, 65065, 66755, 71890, 79079, 93457, 112970, 121660, 130130, 133510, 143780, 146861, 158158, 186914, 225940, 260260, 267020, 293722, 316316, 373828, 395395, 467285, 587444, 734305, 790790, 934570, 1028027, 1468610, 1581580, 1869140, 2056054, 2937220, 4112108, 5140135, 10280270, 20560540]

約数ペア:

[(1, 20560540), (2, 10280270), (4, 5140135), (5, 4112108), (7, 2937220), (10, 2056054), (11, 1869140), (13, 1581580), (14, 1468610), (20, 1028027), (22, 934570), (26, 790790), (28, 734305), (35, 587444), (44, 467285), (52, 395395), (55, 373828), (65, 316316), (70, 293722), (77, 267020), (79, 260260), (91, 225940), (110, 186914), (130, 158158), (140, 146861), (143, 143780), (154, 133510), (158, 130130), (169, 121660), (182, 112970), (220, 93457), (260, 79079), (286, 71890), (308, 66755), (316, 65065), (338, 60830), (364, 56485), (385, 53404), (395, 52052), (455, 45188), (553, 37180), (572, 35945), (676, 30415), (715, 28756), (770, 26702), (790, 26026), (845, 24332), (869, 23660), (910, 22594), (1001, 20540), (1027, 20020), (1106, 18590), (1183, 17380), (1430, 14378), (1540, 13351), (1580, 13013), (1690, 12166), (1738, 11830), (1820, 11297), (1859, 11060), (2002, 10270), (2054, 10010), (2212, 9295), (2366, 8690), (2765, 7436), (2860, 7189), (3380, 6083), (3476, 5915), (3718, 5530), (4004, 5135), (4108, 5005), (4345, 4732)]