20651770

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:183

約数の個数: 64

約数和(自身を含む): 41990400

約数和(自身を除く): 21338630

約数列:

[1, 2, 5, 10, 17, 29, 34, 58, 59, 71, 85, 118, 142, 145, 170, 290, 295, 355, 493, 590, 710, 986, 1003, 1207, 1711, 2006, 2059, 2414, 2465, 3422, 4118, 4189, 4930, 5015, 6035, 8378, 8555, 10030, 10295, 12070, 17110, 20590, 20945, 29087, 35003, 41890, 58174, 70006, 71213, 121481, 142426, 145435, 175015, 242962, 290870, 350030, 356065, 607405, 712130, 1214810, 2065177, 4130354, 10325885, 20651770]

約数ペア:

[(1, 20651770), (2, 10325885), (5, 4130354), (10, 2065177), (17, 1214810), (29, 712130), (34, 607405), (58, 356065), (59, 350030), (71, 290870), (85, 242962), (118, 175015), (142, 145435), (145, 142426), (170, 121481), (290, 71213), (295, 70006), (355, 58174), (493, 41890), (590, 35003), (710, 29087), (986, 20945), (1003, 20590), (1207, 17110), (1711, 12070), (2006, 10295), (2059, 10030), (2414, 8555), (2465, 8378), (3422, 6035), (4118, 5015), (4189, 4930)]