21335139

素因数分解:

$3^2\times 7^2\times {\mathrm{101}}^1\times {\mathrm{479}}^1$

素因数の和:600

約数の個数: 36

約数和(自身を含む): 36279360

約数和(自身を除く): 14944221

約数列:

[1, 3, 7, 9, 21, 49, 63, 101, 147, 303, 441, 479, 707, 909, 1437, 2121, 3353, 4311, 4949, 6363, 10059, 14847, 23471, 30177, 44541, 48379, 70413, 145137, 211239, 338653, 435411, 1015959, 2370571, 3047877, 7111713, 21335139]

約数ペア:

[(1, 21335139), (3, 7111713), (7, 3047877), (9, 2370571), (21, 1015959), (49, 435411), (63, 338653), (101, 211239), (147, 145137), (303, 70413), (441, 48379), (479, 44541), (707, 30177), (909, 23471), (1437, 14847), (2121, 10059), (3353, 6363), (4311, 4949)]