21019509

素因数分解:

$3^2\times 7^1\times {\mathrm{557}}^1\times {\mathrm{599}}^1$

素因数の和:1169

約数の個数: 24

約数和(自身を含む): 34819200

約数和(自身を除く): 13799691

約数列:

[1, 3, 7, 9, 21, 63, 557, 599, 1671, 1797, 3899, 4193, 5013, 5391, 11697, 12579, 35091, 37737, 333643, 1000929, 2335501, 3002787, 7006503, 21019509]

約数ペア:

[(1, 21019509), (3, 7006503), (7, 3002787), (9, 2335501), (21, 1000929), (63, 333643), (557, 37737), (599, 35091), (1671, 12579), (1797, 11697), (3899, 5391), (4193, 5013)]