20731215

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{293}}^1$

素因数の和:443

約数の個数: 32

約数和(自身を含む): 34292160

約数和(自身を除く): 13560945

約数列:

[1, 3, 5, 15, 53, 89, 159, 265, 267, 293, 445, 795, 879, 1335, 1465, 4395, 4717, 14151, 15529, 23585, 26077, 46587, 70755, 77645, 78231, 130385, 232935, 391155, 1382081, 4146243, 6910405, 20731215]

約数ペア:

[(1, 20731215), (3, 6910405), (5, 4146243), (15, 1382081), (53, 391155), (89, 232935), (159, 130385), (265, 78231), (267, 77645), (293, 70755), (445, 46587), (795, 26077), (879, 23585), (1335, 15529), (1465, 14151), (4395, 4717)]