19680705

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{457}}^1$

素因数の和:511

約数の個数: 64

約数和(自身を含む): 39571200

約数和(自身を除く): 19890495

約数列:

[1, 3, 5, 9, 11, 15, 27, 29, 33, 45, 55, 87, 99, 135, 145, 165, 261, 297, 319, 435, 457, 495, 783, 957, 1305, 1371, 1485, 1595, 2285, 2871, 3915, 4113, 4785, 5027, 6855, 8613, 12339, 13253, 14355, 15081, 20565, 25135, 39759, 43065, 45243, 61695, 66265, 75405, 119277, 135729, 145783, 198795, 226215, 357831, 437349, 596385, 678645, 728915, 1312047, 1789155, 2186745, 3936141, 6560235, 19680705]

約数ペア:

[(1, 19680705), (3, 6560235), (5, 3936141), (9, 2186745), (11, 1789155), (15, 1312047), (27, 728915), (29, 678645), (33, 596385), (45, 437349), (55, 357831), (87, 226215), (99, 198795), (135, 145783), (145, 135729), (165, 119277), (261, 75405), (297, 66265), (319, 61695), (435, 45243), (457, 43065), (495, 39759), (783, 25135), (957, 20565), (1305, 15081), (1371, 14355), (1485, 13253), (1595, 12339), (2285, 8613), (2871, 6855), (3915, 5027), (4113, 4785)]