21243897

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1493}}^1$

素因数の和:1550

約数の個数: 32

約数和(自身を含む): 34421760

約数和(自身を除く): 13177863

約数列:

[1, 3, 9, 17, 27, 31, 51, 93, 153, 279, 459, 527, 837, 1493, 1581, 4479, 4743, 13437, 14229, 25381, 40311, 46283, 76143, 138849, 228429, 416547, 685287, 786811, 1249641, 2360433, 7081299, 21243897]

約数ペア:

[(1, 21243897), (3, 7081299), (9, 2360433), (17, 1249641), (27, 786811), (31, 685287), (51, 416547), (93, 228429), (153, 138849), (279, 76143), (459, 46283), (527, 40311), (837, 25381), (1493, 14229), (1581, 13437), (4479, 4743)]