20686545

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^2\times {\mathrm{79}}^1$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 41408640

約数和(自身を除く): 20722095

約数列:

[1, 3, 5, 9, 11, 15, 23, 33, 45, 55, 69, 79, 99, 115, 165, 207, 237, 253, 345, 395, 495, 529, 711, 759, 869, 1035, 1185, 1265, 1587, 1817, 2277, 2607, 2645, 3555, 3795, 4345, 4761, 5451, 5819, 7821, 7935, 9085, 11385, 13035, 16353, 17457, 19987, 23805, 27255, 29095, 39105, 41791, 52371, 59961, 81765, 87285, 99935, 125373, 179883, 208955, 261855, 299805, 376119, 459701, 626865, 899415, 1379103, 1880595, 2298505, 4137309, 6895515, 20686545]

約数ペア:

[(1, 20686545), (3, 6895515), (5, 4137309), (9, 2298505), (11, 1880595), (15, 1379103), (23, 899415), (33, 626865), (45, 459701), (55, 376119), (69, 299805), (79, 261855), (99, 208955), (115, 179883), (165, 125373), (207, 99935), (237, 87285), (253, 81765), (345, 59961), (395, 52371), (495, 41791), (529, 39105), (711, 29095), (759, 27255), (869, 23805), (1035, 19987), (1185, 17457), (1265, 16353), (1587, 13035), (1817, 11385), (2277, 9085), (2607, 7935), (2645, 7821), (3555, 5819), (3795, 5451), (4345, 4761)]