21554379

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1637}}^1$

素因数の和:1680

約数の個数: 48

約数和(自身を含む): 40884480

約数和(自身を除く): 19330101

約数列:

[1, 3, 7, 9, 11, 19, 21, 33, 57, 63, 77, 99, 133, 171, 209, 231, 399, 627, 693, 1197, 1463, 1637, 1881, 4389, 4911, 11459, 13167, 14733, 18007, 31103, 34377, 54021, 93309, 103131, 126049, 162063, 217721, 279927, 342133, 378147, 653163, 1026399, 1134441, 1959489, 2394931, 3079197, 7184793, 21554379]

約数ペア:

[(1, 21554379), (3, 7184793), (7, 3079197), (9, 2394931), (11, 1959489), (19, 1134441), (21, 1026399), (33, 653163), (57, 378147), (63, 342133), (77, 279927), (99, 217721), (133, 162063), (171, 126049), (209, 103131), (231, 93309), (399, 54021), (627, 34377), (693, 31103), (1197, 18007), (1463, 14733), (1637, 13167), (1881, 11459), (4389, 4911)]