21288870

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5501}}^1$

素因数の和:5557

約数の個数: 48

約数和(自身を含む): 56648592

約数和(自身を除く): 35359722

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 43, 45, 86, 90, 129, 215, 258, 387, 430, 645, 774, 1290, 1935, 3870, 5501, 11002, 16503, 27505, 33006, 49509, 55010, 82515, 99018, 165030, 236543, 247545, 473086, 495090, 709629, 1182715, 1419258, 2128887, 2365430, 3548145, 4257774, 7096290, 10644435, 21288870]

約数ペア:

[(1, 21288870), (2, 10644435), (3, 7096290), (5, 4257774), (6, 3548145), (9, 2365430), (10, 2128887), (15, 1419258), (18, 1182715), (30, 709629), (43, 495090), (45, 473086), (86, 247545), (90, 236543), (129, 165030), (215, 99018), (258, 82515), (387, 55010), (430, 49509), (645, 33006), (774, 27505), (1290, 16503), (1935, 11002), (3870, 5501)]