15978753

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1907}}^1$

素因数の和:1946

約数の個数: 36

約数和(自身を含む): 28276560

約数和(自身を除く): 12297807

約数列:

[1, 3, 7, 9, 19, 21, 49, 57, 63, 133, 147, 171, 399, 441, 931, 1197, 1907, 2793, 5721, 8379, 13349, 17163, 36233, 40047, 93443, 108699, 120141, 253631, 280329, 326097, 760893, 840987, 1775417, 2282679, 5326251, 15978753]

約数ペア:

[(1, 15978753), (3, 5326251), (7, 2282679), (9, 1775417), (19, 840987), (21, 760893), (49, 326097), (57, 280329), (63, 253631), (133, 120141), (147, 108699), (171, 93443), (399, 40047), (441, 36233), (931, 17163), (1197, 13349), (1907, 8379), (2793, 5721)]