21994665

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:302

約数の個数: 64

約数和(自身を含む): 44513280

約数和(自身を除く): 22518615

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 137, 139, 165, 231, 385, 411, 417, 685, 695, 959, 973, 1155, 1507, 1529, 2055, 2085, 2877, 2919, 4521, 4587, 4795, 4865, 7535, 7645, 10549, 10703, 14385, 14595, 19043, 22605, 22935, 31647, 32109, 52745, 53515, 57129, 95215, 133301, 158235, 160545, 209473, 285645, 399903, 628419, 666505, 1047365, 1466311, 1999515, 3142095, 4398933, 7331555, 21994665]

約数ペア:

[(1, 21994665), (3, 7331555), (5, 4398933), (7, 3142095), (11, 1999515), (15, 1466311), (21, 1047365), (33, 666505), (35, 628419), (55, 399903), (77, 285645), (105, 209473), (137, 160545), (139, 158235), (165, 133301), (231, 95215), (385, 57129), (411, 53515), (417, 52745), (685, 32109), (695, 31647), (959, 22935), (973, 22605), (1155, 19043), (1507, 14595), (1529, 14385), (2055, 10703), (2085, 10549), (2877, 7645), (2919, 7535), (4521, 4865), (4587, 4795)]