21378028

素因数分解:

$2^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{5573}}^1$

素因数の和:5721

約数の個数: 24

約数和(自身を含む): 43075872

約数和(自身を除く): 21697844

約数列:

[1, 2, 4, 7, 14, 28, 137, 274, 548, 959, 1918, 3836, 5573, 11146, 22292, 39011, 78022, 156044, 763501, 1527002, 3054004, 5344507, 10689014, 21378028]

約数ペア:

[(1, 21378028), (2, 10689014), (4, 5344507), (7, 3054004), (14, 1527002), (28, 763501), (137, 156044), (274, 78022), (548, 39011), (959, 22292), (1918, 11146), (3836, 5573)]