71880879

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:240

約数の個数: 64

約数和(自身を含む): 123171840

約数和(自身を除く): 51290961

約数列:

[1, 3, 7, 17, 21, 29, 51, 53, 87, 119, 131, 159, 203, 357, 371, 393, 493, 609, 901, 917, 1113, 1479, 1537, 2227, 2703, 2751, 3451, 3799, 4611, 6307, 6681, 6943, 10353, 10759, 11397, 15589, 18921, 20829, 26129, 26593, 32277, 46767, 48601, 64583, 78387, 79779, 118031, 145803, 182903, 193749, 201347, 354093, 452081, 548709, 604041, 826217, 1356243, 1409429, 2478651, 3422899, 4228287, 10268697, 23960293, 71880879]

約数ペア:

[(1, 71880879), (3, 23960293), (7, 10268697), (17, 4228287), (21, 3422899), (29, 2478651), (51, 1409429), (53, 1356243), (87, 826217), (119, 604041), (131, 548709), (159, 452081), (203, 354093), (357, 201347), (371, 193749), (393, 182903), (493, 145803), (609, 118031), (901, 79779), (917, 78387), (1113, 64583), (1479, 48601), (1537, 46767), (2227, 32277), (2703, 26593), (2751, 26129), (3451, 20829), (3799, 18921), (4611, 15589), (6307, 11397), (6681, 10759), (6943, 10353)]