18915687

素因数分解:

$3^4\times 7^1\times {\mathrm{73}}^1\times {\mathrm{457}}^1$

素因数の和:549

約数の個数: 40

約数和(自身を含む): 32807456

約数和(自身を除く): 13891769

約数列:

[1, 3, 7, 9, 21, 27, 63, 73, 81, 189, 219, 457, 511, 567, 657, 1371, 1533, 1971, 3199, 4113, 4599, 5913, 9597, 12339, 13797, 28791, 33361, 37017, 41391, 86373, 100083, 233527, 259119, 300249, 700581, 900747, 2101743, 2702241, 6305229, 18915687]

約数ペア:

[(1, 18915687), (3, 6305229), (7, 2702241), (9, 2101743), (21, 900747), (27, 700581), (63, 300249), (73, 259119), (81, 233527), (189, 100083), (219, 86373), (457, 41391), (511, 37017), (567, 33361), (657, 28791), (1371, 13797), (1533, 12339), (1971, 9597), (3199, 5913), (4113, 4599)]