20175155

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1$

素因数の和:204

約数の個数: 64

約数和(自身を含む): 33868800

約数和(自身を除く): 13693645

約数列:

[1, 5, 7, 11, 13, 29, 35, 55, 65, 77, 91, 139, 143, 145, 203, 319, 377, 385, 455, 695, 715, 973, 1001, 1015, 1529, 1595, 1807, 1885, 2233, 2639, 4031, 4147, 4865, 5005, 7645, 9035, 10703, 11165, 12649, 13195, 19877, 20155, 20735, 28217, 29029, 44341, 52403, 53515, 63245, 99385, 139139, 141085, 145145, 221705, 262015, 310387, 366821, 576433, 695695, 1551935, 1834105, 2882165, 4035031, 20175155]

約数ペア:

[(1, 20175155), (5, 4035031), (7, 2882165), (11, 1834105), (13, 1551935), (29, 695695), (35, 576433), (55, 366821), (65, 310387), (77, 262015), (91, 221705), (139, 145145), (143, 141085), (145, 139139), (203, 99385), (319, 63245), (377, 53515), (385, 52403), (455, 44341), (695, 29029), (715, 28217), (973, 20735), (1001, 20155), (1015, 19877), (1529, 13195), (1595, 12649), (1807, 11165), (1885, 10703), (2233, 9035), (2639, 7645), (4031, 5005), (4147, 4865)]