19720221

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{9431}}^1$

素因数の和:9492

約数の個数: 16

約数和(自身を含む): 28522368

約数和(自身を除く): 8802147

約数列:

[1, 3, 17, 41, 51, 123, 697, 2091, 9431, 28293, 160327, 386671, 480981, 1160013, 6573407, 19720221]

約数ペア:

[(1, 19720221), (3, 6573407), (17, 1160013), (41, 480981), (51, 386671), (123, 160327), (697, 28293), (2091, 9431)]