21479705

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:233

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7550695

約数列:

[1, 5, 13, 47, 65, 79, 89, 235, 395, 445, 611, 1027, 1157, 3055, 3713, 4183, 5135, 5785, 7031, 18565, 20915, 35155, 48269, 54379, 91403, 241345, 271895, 330457, 457015, 1652285, 4295941, 21479705]

約数ペア:

[(1, 21479705), (5, 4295941), (13, 1652285), (47, 457015), (65, 330457), (79, 271895), (89, 241345), (235, 91403), (395, 54379), (445, 48269), (611, 35155), (1027, 20915), (1157, 18565), (3055, 7031), (3713, 5785), (4183, 5135)]