20798077185

素因数分解:

$3^5\times 5^1\times {\mathrm{17}}^2\times {\mathrm{61}}^1\times {\mathrm{971}}^1$

素因数の和:1086

約数の個数: 144

約数和(自身を含む): 40406288832

約数和(自身を除く): 19608211647

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 61, 81, 85, 135, 153, 183, 243, 255, 289, 305, 405, 459, 549, 765, 867, 915, 971, 1037, 1215, 1377, 1445, 1647, 2295, 2601, 2745, 2913, 3111, 4131, 4335, 4855, 4941, 5185, 6885, 7803, 8235, 8739, 9333, 13005, 14565, 14823, 15555, 16507, 17629, 20655, 23409, 24705, 26217, 27999, 39015, 43695, 46665, 49521, 52887, 59231, 70227, 74115, 78651, 82535, 83997, 88145, 117045, 131085, 139995, 148563, 158661, 177693, 235953, 247605, 251991, 264435, 280619, 296155, 351135, 393255, 419985, 445689, 475983, 533079, 742815, 793305, 841857, 888465, 1006927, 1179765, 1259955, 1337067, 1403095, 1427949, 1599237, 2228445, 2379915, 2525571, 2665395, 3020781, 4011201, 4209285, 4283847, 4797711, 5034635, 6685335, 7139745, 7576713, 7996185, 9062343, 12627855, 14393133, 15103905, 17117759, 20056005, 21419235, 22730139, 23988555, 27187029, 37883565, 45311715, 51353277, 68190417, 71965665, 81561087, 85588795, 113650695, 135935145, 154059831, 244683261, 256766385, 340952085, 407805435, 462179493, 770299155, 1223416305, 1386538479, 2310897465, 4159615437, 6932692395, 20798077185]

約数ペア:

[(1, 20798077185), (3, 6932692395), (5, 4159615437), (9, 2310897465), (15, 1386538479), (17, 1223416305), (27, 770299155), (45, 462179493), (51, 407805435), (61, 340952085), (81, 256766385), (85, 244683261), (135, 154059831), (153, 135935145), (183, 113650695), (243, 85588795), (255, 81561087), (289, 71965665), (305, 68190417), (405, 51353277), (459, 45311715), (549, 37883565), (765, 27187029), (867, 23988555), (915, 22730139), (971, 21419235), (1037, 20056005), (1215, 17117759), (1377, 15103905), (1445, 14393133), (1647, 12627855), (2295, 9062343), (2601, 7996185), (2745, 7576713), (2913, 7139745), (3111, 6685335), (4131, 5034635), (4335, 4797711), (4855, 4283847), (4941, 4209285), (5185, 4011201), (6885, 3020781), (7803, 2665395), (8235, 2525571), (8739, 2379915), (9333, 2228445), (13005, 1599237), (14565, 1427949), (14823, 1403095), (15555, 1337067), (16507, 1259955), (17629, 1179765), (20655, 1006927), (23409, 888465), (24705, 841857), (26217, 793305), (27999, 742815), (39015, 533079), (43695, 475983), (46665, 445689), (49521, 419985), (52887, 393255), (59231, 351135), (70227, 296155), (74115, 280619), (78651, 264435), (82535, 251991), (83997, 247605), (88145, 235953), (117045, 177693), (131085, 158661), (139995, 148563)]