18742941

素因数分解:

$3^3\times 7^2\times {\mathrm{31}}^1\times {\mathrm{457}}^1$

素因数の和:511

約数の個数: 48

約数和(自身を含む): 33415680

約数和(自身を除く): 14672739

約数列:

[1, 3, 7, 9, 21, 27, 31, 49, 63, 93, 147, 189, 217, 279, 441, 457, 651, 837, 1323, 1371, 1519, 1953, 3199, 4113, 4557, 5859, 9597, 12339, 13671, 14167, 22393, 28791, 41013, 42501, 67179, 86373, 99169, 127503, 201537, 297507, 382509, 604611, 694183, 892521, 2082549, 2677563, 6247647, 18742941]

約数ペア:

[(1, 18742941), (3, 6247647), (7, 2677563), (9, 2082549), (21, 892521), (27, 694183), (31, 604611), (49, 382509), (63, 297507), (93, 201537), (147, 127503), (189, 99169), (217, 86373), (279, 67179), (441, 42501), (457, 41013), (651, 28791), (837, 22393), (1323, 14167), (1371, 13671), (1519, 12339), (1953, 9597), (3199, 5859), (4113, 4557)]