19801118

素因数分解:

$2^1\times {\mathrm{53}}^1\times {\mathrm{367}}^1\times {\mathrm{509}}^1$

素因数の和:931

約数の個数: 16

約数和(自身を含む): 30404160

約数和(自身を除く): 10603042

約数列:

[1, 2, 53, 106, 367, 509, 734, 1018, 19451, 26977, 38902, 53954, 186803, 373606, 9900559, 19801118]

約数ペア:

[(1, 19801118), (2, 9900559), (53, 373606), (106, 186803), (367, 53954), (509, 38902), (734, 26977), (1018, 19451)]