81447560

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{27893}}^1$

素因数の和:27977

約数の個数: 32

約数和(自身を含む): 185774040

約数和(自身を除く): 104326480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 27893, 55786, 111572, 139465, 223144, 278930, 557860, 1115720, 2036189, 4072378, 8144756, 10180945, 16289512, 20361890, 40723780, 81447560]

約数ペア:

[(1, 81447560), (2, 40723780), (4, 20361890), (5, 16289512), (8, 10180945), (10, 8144756), (20, 4072378), (40, 2036189), (73, 1115720), (146, 557860), (292, 278930), (365, 223144), (584, 139465), (730, 111572), (1460, 55786), (2920, 27893)]