21475909

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12421}}^1$

素因数の和:12460

約数の個数: 16

約数和(自身を含む): 27825280

約数和(自身を除く): 6349371

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12421, 86947, 161473, 235999, 1130311, 1651993, 3067987, 21475909]

約数ペア:

[(1, 21475909), (7, 3067987), (13, 1651993), (19, 1130311), (91, 235999), (133, 161473), (247, 86947), (1729, 12421)]