18780705

素因数分解:

$3^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{2801}}^1$

素因数の和:2961

約数の個数: 24

約数和(自身を含む): 32783400

約数和(自身を除く): 14002695

約数列:

[1, 3, 5, 9, 15, 45, 149, 447, 745, 1341, 2235, 2801, 6705, 8403, 14005, 25209, 42015, 126045, 417349, 1252047, 2086745, 3756141, 6260235, 18780705]

約数ペア:

[(1, 18780705), (3, 6260235), (5, 3756141), (9, 2086745), (15, 1252047), (45, 417349), (149, 126045), (447, 42015), (745, 25209), (1341, 14005), (2235, 8403), (2801, 6705)]