21486025

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 31426560

約数和(自身を除く): 9940535

約数列:

[1, 5, 11, 23, 25, 43, 55, 79, 115, 215, 253, 275, 395, 473, 575, 869, 989, 1075, 1265, 1817, 1975, 2365, 3397, 4345, 4945, 6325, 9085, 10879, 11825, 16985, 19987, 21725, 24725, 37367, 45425, 54395, 78131, 84925, 99935, 186835, 271975, 390655, 499675, 859441, 934175, 1953275, 4297205, 21486025]

約数ペア:

[(1, 21486025), (5, 4297205), (11, 1953275), (23, 934175), (25, 859441), (43, 499675), (55, 390655), (79, 271975), (115, 186835), (215, 99935), (253, 84925), (275, 78131), (395, 54395), (473, 45425), (575, 37367), (869, 24725), (989, 21725), (1075, 19987), (1265, 16985), (1817, 11825), (1975, 10879), (2365, 9085), (3397, 6325), (4345, 4945)]