21217155

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{691}}^1$

素因数の和:811

約数の個数: 32

約数和(自身を含む): 35873280

約数和(自身を除く): 14656125

約数列:

[1, 3, 5, 15, 23, 69, 89, 115, 267, 345, 445, 691, 1335, 2047, 2073, 3455, 6141, 10235, 10365, 15893, 30705, 47679, 61499, 79465, 184497, 238395, 307495, 922485, 1414477, 4243431, 7072385, 21217155]

約数ペア:

[(1, 21217155), (3, 7072385), (5, 4243431), (15, 1414477), (23, 922485), (69, 307495), (89, 238395), (115, 184497), (267, 79465), (345, 61499), (445, 47679), (691, 30705), (1335, 15893), (2047, 10365), (2073, 10235), (3455, 6141)]