21057309

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{3673}}^1$

素因数の和:3706

約数の個数: 36

約数和(自身を含む): 38114076

約数和(自身を除く): 17056767

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 91, 117, 147, 273, 441, 637, 819, 1911, 3673, 5733, 11019, 25711, 33057, 47749, 77133, 143247, 179977, 231399, 334243, 429741, 539931, 1002729, 1619793, 2339701, 3008187, 7019103, 21057309]

約数ペア:

[(1, 21057309), (3, 7019103), (7, 3008187), (9, 2339701), (13, 1619793), (21, 1002729), (39, 539931), (49, 429741), (63, 334243), (91, 231399), (117, 179977), (147, 143247), (273, 77133), (441, 47749), (637, 33057), (819, 25711), (1911, 11019), (3673, 5733)]