81336320

素因数分解:

$2^{11}\times 5^1\times {\mathrm{13}}^2\times {\mathrm{47}}^1$

素因数の和:100

約数の個数: 144

約数和(自身を含む): 215822880

約数和(自身を除く): 134486560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 47, 52, 64, 65, 80, 94, 104, 128, 130, 160, 169, 188, 208, 235, 256, 260, 320, 338, 376, 416, 470, 512, 520, 611, 640, 676, 752, 832, 845, 940, 1024, 1040, 1222, 1280, 1352, 1504, 1664, 1690, 1880, 2048, 2080, 2444, 2560, 2704, 3008, 3055, 3328, 3380, 3760, 4160, 4888, 5120, 5408, 6016, 6110, 6656, 6760, 7520, 7943, 8320, 9776, 10240, 10816, 12032, 12220, 13312, 13520, 15040, 15886, 16640, 19552, 21632, 24064, 24440, 26624, 27040, 30080, 31772, 33280, 39104, 39715, 43264, 48128, 48880, 54080, 60160, 63544, 66560, 78208, 79430, 86528, 96256, 97760, 108160, 120320, 127088, 133120, 156416, 158860, 173056, 195520, 216320, 240640, 254176, 312832, 317720, 346112, 391040, 432640, 481280, 508352, 625664, 635440, 782080, 865280, 1016704, 1251328, 1270880, 1564160, 1730560, 2033408, 2541760, 3128320, 4066816, 5083520, 6256640, 8133632, 10167040, 16267264, 20334080, 40668160, 81336320]

約数ペア:

[(1, 81336320), (2, 40668160), (4, 20334080), (5, 16267264), (8, 10167040), (10, 8133632), (13, 6256640), (16, 5083520), (20, 4066816), (26, 3128320), (32, 2541760), (40, 2033408), (47, 1730560), (52, 1564160), (64, 1270880), (65, 1251328), (80, 1016704), (94, 865280), (104, 782080), (128, 635440), (130, 625664), (160, 508352), (169, 481280), (188, 432640), (208, 391040), (235, 346112), (256, 317720), (260, 312832), (320, 254176), (338, 240640), (376, 216320), (416, 195520), (470, 173056), (512, 158860), (520, 156416), (611, 133120), (640, 127088), (676, 120320), (752, 108160), (832, 97760), (845, 96256), (940, 86528), (1024, 79430), (1040, 78208), (1222, 66560), (1280, 63544), (1352, 60160), (1504, 54080), (1664, 48880), (1690, 48128), (1880, 43264), (2048, 39715), (2080, 39104), (2444, 33280), (2560, 31772), (2704, 30080), (3008, 27040), (3055, 26624), (3328, 24440), (3380, 24064), (3760, 21632), (4160, 19552), (4888, 16640), (5120, 15886), (5408, 15040), (6016, 13520), (6110, 13312), (6656, 12220), (6760, 12032), (7520, 10816), (7943, 10240), (8320, 9776)]