18915545

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{787}}^1$

素因数の和:845

約数の個数: 32

約数和(自身を含む): 27233280

約数和(自身を除く): 8317735

約数列:

[1, 5, 11, 19, 23, 55, 95, 115, 209, 253, 437, 787, 1045, 1265, 2185, 3935, 4807, 8657, 14953, 18101, 24035, 43285, 74765, 90505, 164483, 199111, 343919, 822415, 995555, 1719595, 3783109, 18915545]

約数ペア:

[(1, 18915545), (5, 3783109), (11, 1719595), (19, 995555), (23, 822415), (55, 343919), (95, 199111), (115, 164483), (209, 90505), (253, 74765), (437, 43285), (787, 24035), (1045, 18101), (1265, 14953), (2185, 8657), (3935, 4807)]