20194785

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{311}}^1$

素因数の和:375

約数の個数: 64

約数和(自身を含む): 39836160

約数和(自身を除く): 19641375

約数列:

[1, 3, 5, 9, 13, 15, 27, 37, 39, 45, 65, 111, 117, 135, 185, 195, 311, 333, 351, 481, 555, 585, 933, 999, 1443, 1555, 1665, 1755, 2405, 2799, 4043, 4329, 4665, 4995, 7215, 8397, 11507, 12129, 12987, 13995, 20215, 21645, 34521, 36387, 41985, 57535, 60645, 64935, 103563, 109161, 149591, 172605, 181935, 310689, 448773, 517815, 545805, 747955, 1346319, 1553445, 2243865, 4038957, 6731595, 20194785]

約数ペア:

[(1, 20194785), (3, 6731595), (5, 4038957), (9, 2243865), (13, 1553445), (15, 1346319), (27, 747955), (37, 545805), (39, 517815), (45, 448773), (65, 310689), (111, 181935), (117, 172605), (135, 149591), (185, 109161), (195, 103563), (311, 64935), (333, 60645), (351, 57535), (481, 41985), (555, 36387), (585, 34521), (933, 21645), (999, 20215), (1443, 13995), (1555, 12987), (1665, 12129), (1755, 11507), (2405, 8397), (2799, 7215), (4043, 4995), (4329, 4665)]