20389215

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{139}}^1$

素因数の和:292

約数の個数: 64

約数和(自身を含む): 41287680

約数和(自身を除く): 20898465

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 127, 139, 165, 231, 381, 385, 417, 635, 695, 889, 973, 1155, 1397, 1529, 1905, 2085, 2667, 2919, 4191, 4445, 4587, 4865, 6985, 7645, 9779, 10703, 13335, 14595, 17653, 20955, 22935, 29337, 32109, 48895, 52959, 53515, 88265, 123571, 146685, 160545, 194183, 264795, 370713, 582549, 617855, 970915, 1359281, 1853565, 2912745, 4077843, 6796405, 20389215]

約数ペア:

[(1, 20389215), (3, 6796405), (5, 4077843), (7, 2912745), (11, 1853565), (15, 1359281), (21, 970915), (33, 617855), (35, 582549), (55, 370713), (77, 264795), (105, 194183), (127, 160545), (139, 146685), (165, 123571), (231, 88265), (381, 53515), (385, 52959), (417, 48895), (635, 32109), (695, 29337), (889, 22935), (973, 20955), (1155, 17653), (1397, 14595), (1529, 13335), (1905, 10703), (2085, 9779), (2667, 7645), (2919, 6985), (4191, 4865), (4445, 4587)]