21516537

素因数分解:

$3^1\times 7^2\times {\mathrm{197}}^1\times {\mathrm{743}}^1$

素因数の和:957

約数の個数: 24

約数和(自身を含む): 33587136

約数和(自身を除く): 12070599

約数列:

[1, 3, 7, 21, 49, 147, 197, 591, 743, 1379, 2229, 4137, 5201, 9653, 15603, 28959, 36407, 109221, 146371, 439113, 1024597, 3073791, 7172179, 21516537]

約数ペア:

[(1, 21516537), (3, 7172179), (7, 3073791), (21, 1024597), (49, 439113), (147, 146371), (197, 109221), (591, 36407), (743, 28959), (1379, 15603), (2229, 9653), (4137, 5201)]