20320280

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{6959}}^1$

素因数の和:7043

約数の個数: 32

約数和(自身を含む): 46353600

約数和(自身を除く): 26033320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 6959, 13918, 27836, 34795, 55672, 69590, 139180, 278360, 508007, 1016014, 2032028, 2540035, 4064056, 5080070, 10160140, 20320280]

約数ペア:

[(1, 20320280), (2, 10160140), (4, 5080070), (5, 4064056), (8, 2540035), (10, 2032028), (20, 1016014), (40, 508007), (73, 278360), (146, 139180), (292, 69590), (365, 55672), (584, 34795), (730, 27836), (1460, 13918), (2920, 6959)]