21890109

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{8171}}^1$

素因数の和:8240

約数の個数: 16

約数和(自身を含む): 31380480

約数和(自身を除く): 9490371

約数列:

[1, 3, 19, 47, 57, 141, 893, 2679, 8171, 24513, 155249, 384037, 465747, 1152111, 7296703, 21890109]

約数ペア:

[(1, 21890109), (3, 7296703), (19, 1152111), (47, 465747), (57, 384037), (141, 155249), (893, 24513), (2679, 8171)]