21513165

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1\times {\mathrm{491}}^1$

素因数の和:649

約数の個数: 32

約数和(自身を含む): 36274176

約数和(自身を除く): 14761011

約数列:

[1, 3, 5, 15, 23, 69, 115, 127, 345, 381, 491, 635, 1473, 1905, 2455, 2921, 7365, 8763, 11293, 14605, 33879, 43815, 56465, 62357, 169395, 187071, 311785, 935355, 1434211, 4302633, 7171055, 21513165]

約数ペア:

[(1, 21513165), (3, 7171055), (5, 4302633), (15, 1434211), (23, 935355), (69, 311785), (115, 187071), (127, 169395), (345, 62357), (381, 56465), (491, 43815), (635, 33879), (1473, 14605), (1905, 11293), (2455, 8763), (2921, 7365)]