21921039

素因数分解:

$3^2\times 7^1\times {\mathrm{349}}^1\times {\mathrm{997}}^1$

素因数の和:1359

約数の個数: 24

約数和(自身を含む): 36327200

約数和(自身を除く): 14406161

約数列:

[1, 3, 7, 9, 21, 63, 349, 997, 1047, 2443, 2991, 3141, 6979, 7329, 8973, 20937, 21987, 62811, 347953, 1043859, 2435671, 3131577, 7307013, 21921039]

約数ペア:

[(1, 21921039), (3, 7307013), (7, 3131577), (9, 2435671), (21, 1043859), (63, 347953), (349, 62811), (997, 21987), (1047, 20937), (2443, 8973), (2991, 7329), (3141, 6979)]