21490227

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{113}}^2$

素因数の和:260

約数の個数: 36

約数和(自身を含む): 36175464

約数和(自身を除く): 14685237

約数列:

[1, 3, 9, 11, 17, 33, 51, 99, 113, 153, 187, 339, 561, 1017, 1243, 1683, 1921, 3729, 5763, 11187, 12769, 17289, 21131, 38307, 63393, 114921, 140459, 190179, 217073, 421377, 651219, 1264131, 1953657, 2387803, 7163409, 21490227]

約数ペア:

[(1, 21490227), (3, 7163409), (9, 2387803), (11, 1953657), (17, 1264131), (33, 651219), (51, 421377), (99, 217073), (113, 190179), (153, 140459), (187, 114921), (339, 63393), (561, 38307), (1017, 21131), (1243, 17289), (1683, 12769), (1921, 11187), (3729, 5763)]