21254643

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{4951}}^1$

素因数の和:5016

約数の個数: 20

約数和(自身を含む): 32356368

約数和(自身を除く): 11101725

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 4293, 4951, 14853, 44559, 133677, 262403, 401031, 787209, 2361627, 7084881, 21254643]

約数ペア:

[(1, 21254643), (3, 7084881), (9, 2361627), (27, 787209), (53, 401031), (81, 262403), (159, 133677), (477, 44559), (1431, 14853), (4293, 4951)]