21263385

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{431}}^1$

素因数の和:486

約数の個数: 64

約数和(自身を含む): 41803776

約数和(自身を除く): 20540391

約数列:

[1, 3, 5, 11, 13, 15, 23, 33, 39, 55, 65, 69, 115, 143, 165, 195, 253, 299, 345, 429, 431, 715, 759, 897, 1265, 1293, 1495, 2145, 2155, 3289, 3795, 4485, 4741, 5603, 6465, 9867, 9913, 14223, 16445, 16809, 23705, 28015, 29739, 49335, 49565, 61633, 71115, 84045, 109043, 128869, 148695, 184899, 308165, 327129, 386607, 545215, 644345, 924495, 1417559, 1635645, 1933035, 4252677, 7087795, 21263385]

約数ペア:

[(1, 21263385), (3, 7087795), (5, 4252677), (11, 1933035), (13, 1635645), (15, 1417559), (23, 924495), (33, 644345), (39, 545215), (55, 386607), (65, 327129), (69, 308165), (115, 184899), (143, 148695), (165, 128869), (195, 109043), (253, 84045), (299, 71115), (345, 61633), (429, 49565), (431, 49335), (715, 29739), (759, 28015), (897, 23705), (1265, 16809), (1293, 16445), (1495, 14223), (2145, 9913), (2155, 9867), (3289, 6465), (3795, 5603), (4485, 4741)]