20918772

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{257}}^1$

素因数の和:310

約数の個数: 144

約数和(自身を含む): 67616640

約数和(自身を除く): 46697868

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 17, 18, 19, 21, 28, 34, 36, 38, 42, 51, 57, 63, 68, 76, 84, 102, 114, 119, 126, 133, 153, 171, 204, 228, 238, 252, 257, 266, 306, 323, 342, 357, 399, 476, 514, 532, 612, 646, 684, 714, 771, 798, 969, 1028, 1071, 1197, 1292, 1428, 1542, 1596, 1799, 1938, 2142, 2261, 2313, 2394, 2907, 3084, 3598, 3876, 4284, 4369, 4522, 4626, 4788, 4883, 5397, 5814, 6783, 7196, 8738, 9044, 9252, 9766, 10794, 11628, 13107, 13566, 14649, 16191, 17476, 19532, 20349, 21588, 26214, 27132, 29298, 30583, 32382, 34181, 39321, 40698, 43947, 52428, 58596, 61166, 64764, 68362, 78642, 81396, 83011, 87894, 91749, 102543, 122332, 136724, 157284, 166022, 175788, 183498, 205086, 249033, 275247, 307629, 332044, 366996, 410172, 498066, 550494, 581077, 615258, 747099, 996132, 1100988, 1162154, 1230516, 1494198, 1743231, 2324308, 2988396, 3486462, 5229693, 6972924, 10459386, 20918772]

約数ペア:

[(1, 20918772), (2, 10459386), (3, 6972924), (4, 5229693), (6, 3486462), (7, 2988396), (9, 2324308), (12, 1743231), (14, 1494198), (17, 1230516), (18, 1162154), (19, 1100988), (21, 996132), (28, 747099), (34, 615258), (36, 581077), (38, 550494), (42, 498066), (51, 410172), (57, 366996), (63, 332044), (68, 307629), (76, 275247), (84, 249033), (102, 205086), (114, 183498), (119, 175788), (126, 166022), (133, 157284), (153, 136724), (171, 122332), (204, 102543), (228, 91749), (238, 87894), (252, 83011), (257, 81396), (266, 78642), (306, 68362), (323, 64764), (342, 61166), (357, 58596), (399, 52428), (476, 43947), (514, 40698), (532, 39321), (612, 34181), (646, 32382), (684, 30583), (714, 29298), (771, 27132), (798, 26214), (969, 21588), (1028, 20349), (1071, 19532), (1197, 17476), (1292, 16191), (1428, 14649), (1542, 13566), (1596, 13107), (1799, 11628), (1938, 10794), (2142, 9766), (2261, 9252), (2313, 9044), (2394, 8738), (2907, 7196), (3084, 6783), (3598, 5814), (3876, 5397), (4284, 4883), (4369, 4788), (4522, 4626)]