18528669

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:247

約数の個数: 40

約数和(自身を含む): 29365248

約数和(自身を除く): 10836579

約数列:

[1, 3, 9, 27, 31, 47, 81, 93, 141, 157, 279, 423, 471, 837, 1269, 1413, 1457, 2511, 3807, 4239, 4371, 4867, 7379, 12717, 13113, 14601, 22137, 39339, 43803, 66411, 118017, 131409, 199233, 228749, 394227, 597699, 686247, 2058741, 6176223, 18528669]

約数ペア:

[(1, 18528669), (3, 6176223), (9, 2058741), (27, 686247), (31, 597699), (47, 394227), (81, 228749), (93, 199233), (141, 131409), (157, 118017), (279, 66411), (423, 43803), (471, 39339), (837, 22137), (1269, 14601), (1413, 13113), (1457, 12717), (2511, 7379), (3807, 4867), (4239, 4371)]