20217596980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{557573}}^1$

素因数の和:557633

約数の個数: 72

約数和(自身を含む): 50723621928

約数和(自身を除く): 30506024948

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 49, 70, 74, 98, 140, 148, 185, 196, 245, 259, 370, 490, 518, 740, 980, 1036, 1295, 1813, 2590, 3626, 5180, 7252, 9065, 18130, 36260, 557573, 1115146, 2230292, 2787865, 3903011, 5575730, 7806022, 11151460, 15612044, 19515055, 20630201, 27321077, 39030110, 41260402, 54642154, 78060220, 82520804, 103151005, 109284308, 136605385, 144411407, 206302010, 273210770, 288822814, 412604020, 546421540, 577645628, 722057035, 1010879849, 1444114070, 2021759698, 2888228140, 4043519396, 5054399245, 10108798490, 20217596980]

約数ペア:

[(1, 20217596980), (2, 10108798490), (4, 5054399245), (5, 4043519396), (7, 2888228140), (10, 2021759698), (14, 1444114070), (20, 1010879849), (28, 722057035), (35, 577645628), (37, 546421540), (49, 412604020), (70, 288822814), (74, 273210770), (98, 206302010), (140, 144411407), (148, 136605385), (185, 109284308), (196, 103151005), (245, 82520804), (259, 78060220), (370, 54642154), (490, 41260402), (518, 39030110), (740, 27321077), (980, 20630201), (1036, 19515055), (1295, 15612044), (1813, 11151460), (2590, 7806022), (3626, 5575730), (5180, 3903011), (7252, 2787865), (9065, 2230292), (18130, 1115146), (36260, 557573)]