20125917

素因数分解:

$3^2\times 7^2\times {\mathrm{47}}^1\times {\mathrm{971}}^1$

素因数の和:1038

約数の個数: 36

約数和(自身を含む): 34572096

約数和(自身を除く): 14446179

約数列:

[1, 3, 7, 9, 21, 47, 49, 63, 141, 147, 329, 423, 441, 971, 987, 2303, 2913, 2961, 6797, 6909, 8739, 20391, 20727, 45637, 47579, 61173, 136911, 142737, 319459, 410733, 428211, 958377, 2236213, 2875131, 6708639, 20125917]

約数ペア:

[(1, 20125917), (3, 6708639), (7, 2875131), (9, 2236213), (21, 958377), (47, 428211), (49, 410733), (63, 319459), (141, 142737), (147, 136911), (329, 61173), (423, 47579), (441, 45637), (971, 20727), (987, 20391), (2303, 8739), (2913, 6909), (2961, 6797)]