21334509

素因数分解:

$3^4\times 7^1\times {\mathrm{191}}^1\times {\mathrm{197}}^1$

素因数の和:407

約数の個数: 40

約数和(自身を含む): 36799488

約数和(自身を除く): 15464979

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 191, 197, 567, 573, 591, 1337, 1379, 1719, 1773, 4011, 4137, 5157, 5319, 12033, 12411, 15471, 15957, 36099, 37233, 37627, 108297, 111699, 112881, 263389, 338643, 790167, 1015929, 2370501, 3047787, 7111503, 21334509]

約数ペア:

[(1, 21334509), (3, 7111503), (7, 3047787), (9, 2370501), (21, 1015929), (27, 790167), (63, 338643), (81, 263389), (189, 112881), (191, 111699), (197, 108297), (567, 37627), (573, 37233), (591, 36099), (1337, 15957), (1379, 15471), (1719, 12411), (1773, 12033), (4011, 5319), (4137, 5157)]