21487515

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{113}}^1\times {\mathrm{1811}}^1$

素因数の和:1939

約数の個数: 32

約数和(自身を含む): 39661056

約数和(自身を除く): 18173541

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 113, 339, 565, 791, 1695, 1811, 2373, 3955, 5433, 9055, 11865, 12677, 27165, 38031, 63385, 190155, 204643, 613929, 1023215, 1432501, 3069645, 4297503, 7162505, 21487515]

約数ペア:

[(1, 21487515), (3, 7162505), (5, 4297503), (7, 3069645), (15, 1432501), (21, 1023215), (35, 613929), (105, 204643), (113, 190155), (339, 63385), (565, 38031), (791, 27165), (1695, 12677), (1811, 11865), (2373, 9055), (3955, 5433)]