18728647

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{1907}}^1$

素因数の和:1998

約数の個数: 16

約数和(自身を含む): 22712832

約数和(自身を除く): 3984185

約数列:

[1, 7, 23, 61, 161, 427, 1403, 1907, 9821, 13349, 43861, 116327, 307027, 814289, 2675521, 18728647]

約数ペア:

[(1, 18728647), (7, 2675521), (23, 814289), (61, 307027), (161, 116327), (427, 43861), (1403, 13349), (1907, 9821)]