21149755

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{547}}^1$

素因数の和:619

約数の個数: 32

約数和(自身を含む): 29986560

約数和(自身を除く): 8836805

約数列:

[1, 5, 11, 19, 37, 55, 95, 185, 209, 407, 547, 703, 1045, 2035, 2735, 3515, 6017, 7733, 10393, 20239, 30085, 38665, 51965, 101195, 114323, 222629, 384541, 571615, 1113145, 1922705, 4229951, 21149755]

約数ペア:

[(1, 21149755), (5, 4229951), (11, 1922705), (19, 1113145), (37, 571615), (55, 384541), (95, 222629), (185, 114323), (209, 101195), (407, 51965), (547, 38665), (703, 30085), (1045, 20239), (2035, 10393), (2735, 7733), (3515, 6017)]