21904155

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1783}}^1$

素因数の和:1817

約数の個数: 64

約数和(自身を含む): 47953920

約数和(自身を除く): 26049765

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 27, 35, 39, 45, 63, 65, 91, 105, 117, 135, 189, 195, 273, 315, 351, 455, 585, 819, 945, 1365, 1755, 1783, 2457, 4095, 5349, 8915, 12285, 12481, 16047, 23179, 26745, 37443, 48141, 62405, 69537, 80235, 112329, 115895, 162253, 187215, 208611, 240705, 336987, 347685, 486759, 561645, 625833, 811265, 1043055, 1460277, 1684935, 2433795, 3129165, 4380831, 7301385, 21904155]

約数ペア:

[(1, 21904155), (3, 7301385), (5, 4380831), (7, 3129165), (9, 2433795), (13, 1684935), (15, 1460277), (21, 1043055), (27, 811265), (35, 625833), (39, 561645), (45, 486759), (63, 347685), (65, 336987), (91, 240705), (105, 208611), (117, 187215), (135, 162253), (189, 115895), (195, 112329), (273, 80235), (315, 69537), (351, 62405), (455, 48141), (585, 37443), (819, 26745), (945, 23179), (1365, 16047), (1755, 12481), (1783, 12285), (2457, 8915), (4095, 5349)]