21325241

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{139}}^1$

素因数の和:285

約数の個数: 24

約数和(自身を含む): 26046720

約数和(自身を除く): 4721479

約数列:

[1, 7, 31, 49, 101, 139, 217, 707, 973, 1519, 3131, 4309, 4949, 6811, 14039, 21917, 30163, 98273, 153419, 211141, 435209, 687911, 3046463, 21325241]

約数ペア:

[(1, 21325241), (7, 3046463), (31, 687911), (49, 435209), (101, 211141), (139, 153419), (217, 98273), (707, 30163), (973, 21917), (1519, 14039), (3131, 6811), (4309, 4949)]