21137456

素因数分解:

$2^4\times {\mathrm{137}}^1\times {\mathrm{9643}}^1$

素因数の和:9788

約数の個数: 20

約数和(自身を含む): 41257032

約数和(自身を除く): 20119576

約数列:

[1, 2, 4, 8, 16, 137, 274, 548, 1096, 2192, 9643, 19286, 38572, 77144, 154288, 1321091, 2642182, 5284364, 10568728, 21137456]

約数ペア:

[(1, 21137456), (2, 10568728), (4, 5284364), (8, 2642182), (16, 1321091), (137, 154288), (274, 77144), (548, 38572), (1096, 19286), (2192, 9643)]