81591075

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{257}}^1$

素因数の和:373

約数の個数: 72

約数和(自身を含む): 157208688

約数和(自身を除く): 75617613

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 83, 85, 153, 225, 249, 255, 257, 415, 425, 747, 765, 771, 1245, 1275, 1285, 1411, 2075, 2313, 3735, 3825, 3855, 4233, 4369, 6225, 6425, 7055, 11565, 12699, 13107, 18675, 19275, 21165, 21331, 21845, 35275, 39321, 57825, 63495, 63993, 65535, 105825, 106655, 109225, 191979, 196605, 317475, 319965, 327675, 362627, 533275, 959895, 983025, 1087881, 1599825, 1813135, 3263643, 4799475, 5439405, 9065675, 16318215, 27197025, 81591075]

約数ペア:

[(1, 81591075), (3, 27197025), (5, 16318215), (9, 9065675), (15, 5439405), (17, 4799475), (25, 3263643), (45, 1813135), (51, 1599825), (75, 1087881), (83, 983025), (85, 959895), (153, 533275), (225, 362627), (249, 327675), (255, 319965), (257, 317475), (415, 196605), (425, 191979), (747, 109225), (765, 106655), (771, 105825), (1245, 65535), (1275, 63993), (1285, 63495), (1411, 57825), (2075, 39321), (2313, 35275), (3735, 21845), (3825, 21331), (3855, 21165), (4233, 19275), (4369, 18675), (6225, 13107), (6425, 12699), (7055, 11565)]