21661365

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{2477}}^1$

素因数の和:2549

約数の個数: 32

約数和(自身を含む): 38537856

約数和(自身を除く): 16876491

約数列:

[1, 3, 5, 11, 15, 33, 53, 55, 159, 165, 265, 583, 795, 1749, 2477, 2915, 7431, 8745, 12385, 27247, 37155, 81741, 131281, 136235, 393843, 408705, 656405, 1444091, 1969215, 4332273, 7220455, 21661365]

約数ペア:

[(1, 21661365), (3, 7220455), (5, 4332273), (11, 1969215), (15, 1444091), (33, 656405), (53, 408705), (55, 393843), (159, 136235), (165, 131281), (265, 81741), (583, 37155), (795, 27247), (1749, 12385), (2477, 8745), (2915, 7431)]