21996891

素因数分解:

$3^2\times 7^1\times {\mathrm{101}}^1\times {\mathrm{3457}}^1$

素因数の和:3571

約数の個数: 24

約数和(自身を含む): 36682464

約数和(自身を除く): 14685573

約数列:

[1, 3, 7, 9, 21, 63, 101, 303, 707, 909, 2121, 3457, 6363, 10371, 24199, 31113, 72597, 217791, 349157, 1047471, 2444099, 3142413, 7332297, 21996891]

約数ペア:

[(1, 21996891), (3, 7332297), (7, 3142413), (9, 2444099), (21, 1047471), (63, 349157), (101, 217791), (303, 72597), (707, 31113), (909, 24199), (2121, 10371), (3457, 6363)]