218394715

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{53}}^1\times {\mathrm{139}}^1$

素因数の和:233

約数の個数: 72

約数和(自身を含む): 343874160

約数和(自身を除く): 125479445

約数列:

[1, 5, 7, 11, 35, 49, 53, 55, 77, 121, 139, 245, 265, 371, 385, 539, 583, 605, 695, 847, 973, 1529, 1855, 2597, 2695, 2915, 4081, 4235, 4865, 5929, 6413, 6811, 7367, 7645, 10703, 12985, 16819, 20405, 28567, 29645, 32065, 34055, 36835, 44891, 51569, 53515, 74921, 81037, 84095, 117733, 142835, 224455, 257845, 314237, 360983, 374605, 405185, 567259, 588665, 824131, 891407, 1571185, 1804915, 2836295, 3970813, 4120655, 4457035, 6239849, 19854065, 31199245, 43678943, 218394715]

約数ペア:

[(1, 218394715), (5, 43678943), (7, 31199245), (11, 19854065), (35, 6239849), (49, 4457035), (53, 4120655), (55, 3970813), (77, 2836295), (121, 1804915), (139, 1571185), (245, 891407), (265, 824131), (371, 588665), (385, 567259), (539, 405185), (583, 374605), (605, 360983), (695, 314237), (847, 257845), (973, 224455), (1529, 142835), (1855, 117733), (2597, 84095), (2695, 81037), (2915, 74921), (4081, 53515), (4235, 51569), (4865, 44891), (5929, 36835), (6413, 34055), (6811, 32065), (7367, 29645), (7645, 28567), (10703, 20405), (12985, 16819)]