21357225

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{4127}}^1$

素因数の和:4166

約数の個数: 36

約数和(自身を含む): 39926016

約数和(自身を除く): 18568791

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 69, 75, 115, 207, 225, 345, 575, 1035, 1725, 4127, 5175, 12381, 20635, 37143, 61905, 94921, 103175, 185715, 284763, 309525, 474605, 854289, 928575, 1423815, 2373025, 4271445, 7119075, 21357225]

約数ペア:

[(1, 21357225), (3, 7119075), (5, 4271445), (9, 2373025), (15, 1423815), (23, 928575), (25, 854289), (45, 474605), (69, 309525), (75, 284763), (115, 185715), (207, 103175), (225, 94921), (345, 61905), (575, 37143), (1035, 20635), (1725, 12381), (4127, 5175)]