21266906

素因数分解:

$2^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1\times {\mathrm{761}}^1$

素因数の和:1009

約数の個数: 16

約数和(自身を含む): 32506920

約数和(自身を除く): 11240014

約数列:

[1, 2, 89, 157, 178, 314, 761, 1522, 13973, 27946, 67729, 119477, 135458, 238954, 10633453, 21266906]

約数ペア:

[(1, 21266906), (2, 10633453), (89, 238954), (157, 135458), (178, 119477), (314, 67729), (761, 27946), (1522, 13973)]