21191373

素因数分解:

$3^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{1657}}^1$

素因数の和:1706

約数の個数: 36

約数和(自身を含む): 36857340

約数和(自身を除く): 15665967

約数列:

[1, 3, 7, 9, 21, 29, 49, 63, 87, 147, 203, 261, 441, 609, 1421, 1657, 1827, 4263, 4971, 11599, 12789, 14913, 34797, 48053, 81193, 104391, 144159, 243579, 336371, 432477, 730737, 1009113, 2354597, 3027339, 7063791, 21191373]

約数ペア:

[(1, 21191373), (3, 7063791), (7, 3027339), (9, 2354597), (21, 1009113), (29, 730737), (49, 432477), (63, 336371), (87, 243579), (147, 144159), (203, 104391), (261, 81193), (441, 48053), (609, 34797), (1421, 14913), (1657, 12789), (1827, 11599), (4263, 4971)]