21185805

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{113}}^1\times {\mathrm{431}}^1$

素因数の和:581

約数の個数: 32

約数和(自身を含む): 35458560

約数和(自身を除く): 14272755

約数列:

[1, 3, 5, 15, 29, 87, 113, 145, 339, 431, 435, 565, 1293, 1695, 2155, 3277, 6465, 9831, 12499, 16385, 37497, 48703, 49155, 62495, 146109, 187485, 243515, 730545, 1412387, 4237161, 7061935, 21185805]

約数ペア:

[(1, 21185805), (3, 7061935), (5, 4237161), (15, 1412387), (29, 730545), (87, 243515), (113, 187485), (145, 146109), (339, 62495), (431, 49155), (435, 48703), (565, 37497), (1293, 16385), (1695, 12499), (2155, 9831), (3277, 6465)]