18540921

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^2\times {\mathrm{1669}}^1$

素因数の和:1725

約数の個数: 24

約数和(自身を含む): 29552320

約数和(自身を除く): 11011399

約数列:

[1, 3, 7, 21, 23, 69, 161, 483, 529, 1587, 1669, 3703, 5007, 11109, 11683, 35049, 38387, 115161, 268709, 806127, 882901, 2648703, 6180307, 18540921]

約数ペア:

[(1, 18540921), (3, 6180307), (7, 2648703), (21, 882901), (23, 806127), (69, 268709), (161, 115161), (483, 38387), (529, 35049), (1587, 11683), (1669, 11109), (3703, 5007)]