20219556

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{251}}^1$

素因数の和:409

約数の個数: 72

約数和(自身を含む): 55502496

約数和(自身を除く): 35282940

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 84, 98, 137, 147, 196, 251, 274, 294, 411, 502, 548, 588, 753, 822, 959, 1004, 1506, 1644, 1757, 1918, 2877, 3012, 3514, 3836, 5271, 5754, 6713, 7028, 10542, 11508, 12299, 13426, 20139, 21084, 24598, 26852, 34387, 36897, 40278, 49196, 68774, 73794, 80556, 103161, 137548, 147588, 206322, 240709, 412644, 481418, 722127, 962836, 1444254, 1684963, 2888508, 3369926, 5054889, 6739852, 10109778, 20219556]

約数ペア:

[(1, 20219556), (2, 10109778), (3, 6739852), (4, 5054889), (6, 3369926), (7, 2888508), (12, 1684963), (14, 1444254), (21, 962836), (28, 722127), (42, 481418), (49, 412644), (84, 240709), (98, 206322), (137, 147588), (147, 137548), (196, 103161), (251, 80556), (274, 73794), (294, 68774), (411, 49196), (502, 40278), (548, 36897), (588, 34387), (753, 26852), (822, 24598), (959, 21084), (1004, 20139), (1506, 13426), (1644, 12299), (1757, 11508), (1918, 10542), (2877, 7028), (3012, 6713), (3514, 5754), (3836, 5271)]