21000812553

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{2027}}^1\times {\mathrm{3499}}^1$

素因数の和:5586

約数の個数: 48

約数和(自身を含む): 35433216000

約数和(自身を除く): 14432403447

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2027, 2961, 3499, 6081, 10497, 14189, 18243, 24493, 31491, 42567, 73479, 95269, 127701, 164453, 220437, 285807, 493359, 666883, 857421, 1151171, 1480077, 2000649, 3453513, 6001947, 7092473, 10360539, 21277419, 49647311, 63832257, 148941933, 333346231, 446825799, 1000038693, 2333423617, 3000116079, 7000270851, 21000812553]

約数ペア:

[(1, 21000812553), (3, 7000270851), (7, 3000116079), (9, 2333423617), (21, 1000038693), (47, 446825799), (63, 333346231), (141, 148941933), (329, 63832257), (423, 49647311), (987, 21277419), (2027, 10360539), (2961, 7092473), (3499, 6001947), (6081, 3453513), (10497, 2000649), (14189, 1480077), (18243, 1151171), (24493, 857421), (31491, 666883), (42567, 493359), (73479, 285807), (95269, 220437), (127701, 164453)]