21086716

素因数分解:

$2^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{10607}}^1$

素因数の和:10689

約数の個数: 24

約数和(自身を含む): 42771456

約数和(自身を除く): 21684740

約数列:

[1, 2, 4, 7, 14, 28, 71, 142, 284, 497, 994, 1988, 10607, 21214, 42428, 74249, 148498, 296996, 753097, 1506194, 3012388, 5271679, 10543358, 21086716]

約数ペア:

[(1, 21086716), (2, 10543358), (4, 5271679), (7, 3012388), (14, 1506194), (28, 753097), (71, 296996), (142, 148498), (284, 74249), (497, 42428), (994, 21214), (1988, 10607)]