21729141

素因数分解:

$3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{2017}}^1$

素因数の和:2055

約数の個数: 40

約数和(自身を含む): 39068480

約数和(自身を除く): 17339339

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 133, 171, 189, 399, 513, 567, 1197, 1539, 2017, 3591, 6051, 10773, 14119, 18153, 38323, 42357, 54459, 114969, 127071, 163377, 268261, 344907, 381213, 804783, 1034721, 1143639, 2414349, 3104163, 7243047, 21729141]

約数ペア:

[(1, 21729141), (3, 7243047), (7, 3104163), (9, 2414349), (19, 1143639), (21, 1034721), (27, 804783), (57, 381213), (63, 344907), (81, 268261), (133, 163377), (171, 127071), (189, 114969), (399, 54459), (513, 42357), (567, 38323), (1197, 18153), (1539, 14119), (2017, 10773), (3591, 6051)]