18720213

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{557}}^1\times {\mathrm{659}}^1$

素因数の和:1236

約数の個数: 16

約数和(自身を含む): 26516160

約数和(自身を除く): 7795947

約数列:

[1, 3, 17, 51, 557, 659, 1671, 1977, 9469, 11203, 28407, 33609, 367063, 1101189, 6240071, 18720213]

約数ペア:

[(1, 18720213), (3, 6240071), (17, 1101189), (51, 367063), (557, 33609), (659, 28407), (1671, 11203), (1977, 9469)]