21153715

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{2767}}^1$

素因数の和:2922

約数の個数: 16

約数和(自身を含む): 27901440

約数和(自身を除く): 6747725

約数列:

[1, 5, 11, 55, 139, 695, 1529, 2767, 7645, 13835, 30437, 152185, 384613, 1923065, 4230743, 21153715]

約数ペア:

[(1, 21153715), (5, 4230743), (11, 1923065), (55, 384613), (139, 152185), (695, 30437), (1529, 13835), (2767, 7645)]