21365379

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19949}}^1$

素因数の和:19979

約数の個数: 24

約数和(自身を含む): 37346400

約数和(自身を除く): 15981021

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 19949, 59847, 139643, 179541, 339133, 418929, 1017399, 1256787, 2373931, 3052197, 7121793, 21365379]

約数ペア:

[(1, 21365379), (3, 7121793), (7, 3052197), (9, 2373931), (17, 1256787), (21, 1017399), (51, 418929), (63, 339133), (119, 179541), (153, 139643), (357, 59847), (1071, 19949)]