20516895

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{7237}}^1$

素因数の和:7261

約数の個数: 40

約数和(自身を含む): 42038304

約数和(自身を除く): 21521409

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 7237, 21711, 36185, 50659, 65133, 108555, 151977, 195399, 253295, 325665, 455931, 586197, 759885, 976995, 1367793, 2279655, 2930985, 4103379, 6838965, 20516895]

約数ペア:

[(1, 20516895), (3, 6838965), (5, 4103379), (7, 2930985), (9, 2279655), (15, 1367793), (21, 976995), (27, 759885), (35, 586197), (45, 455931), (63, 325665), (81, 253295), (105, 195399), (135, 151977), (189, 108555), (315, 65133), (405, 50659), (567, 36185), (945, 21711), (2835, 7237)]