21541635

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{971}}^1$

素因数の和:1028

約数の個数: 48

約数和(自身を含む): 40940640

約数和(自身を除く): 19399005

約数列:

[1, 3, 5, 9, 15, 17, 29, 45, 51, 85, 87, 145, 153, 255, 261, 435, 493, 765, 971, 1305, 1479, 2465, 2913, 4437, 4855, 7395, 8739, 14565, 16507, 22185, 28159, 43695, 49521, 82535, 84477, 140795, 148563, 247605, 253431, 422385, 478703, 742815, 1267155, 1436109, 2393515, 4308327, 7180545, 21541635]

約数ペア:

[(1, 21541635), (3, 7180545), (5, 4308327), (9, 2393515), (15, 1436109), (17, 1267155), (29, 742815), (45, 478703), (51, 422385), (85, 253431), (87, 247605), (145, 148563), (153, 140795), (255, 84477), (261, 82535), (435, 49521), (493, 43695), (765, 28159), (971, 22185), (1305, 16507), (1479, 14565), (2465, 8739), (2913, 7395), (4437, 4855)]