19987784

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:182

約数の個数: 64

約数和(自身を含む): 41990400

約数和(自身を除く): 22002616

約数列:

[1, 2, 4, 8, 17, 34, 47, 53, 59, 68, 94, 106, 118, 136, 188, 212, 236, 376, 424, 472, 799, 901, 1003, 1598, 1802, 2006, 2491, 2773, 3127, 3196, 3604, 4012, 4982, 5546, 6254, 6392, 7208, 8024, 9964, 11092, 12508, 19928, 22184, 25016, 42347, 47141, 53159, 84694, 94282, 106318, 146969, 169388, 188564, 212636, 293938, 338776, 377128, 425272, 587876, 1175752, 2498473, 4996946, 9993892, 19987784]

約数ペア:

[(1, 19987784), (2, 9993892), (4, 4996946), (8, 2498473), (17, 1175752), (34, 587876), (47, 425272), (53, 377128), (59, 338776), (68, 293938), (94, 212636), (106, 188564), (118, 169388), (136, 146969), (188, 106318), (212, 94282), (236, 84694), (376, 53159), (424, 47141), (472, 42347), (799, 25016), (901, 22184), (1003, 19928), (1598, 12508), (1802, 11092), (2006, 9964), (2491, 8024), (2773, 7208), (3127, 6392), (3196, 6254), (3604, 5546), (4012, 4982)]