21989695

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1559}}^1$

素因数の和:1615

約数の個数: 32

約数和(自身を含む): 33546240

約数和(自身を除く): 11556545

約数列:

[1, 5, 7, 13, 31, 35, 65, 91, 155, 217, 403, 455, 1085, 1559, 2015, 2821, 7795, 10913, 14105, 20267, 48329, 54565, 101335, 141869, 241645, 338303, 628277, 709345, 1691515, 3141385, 4397939, 21989695]

約数ペア:

[(1, 21989695), (5, 4397939), (7, 3141385), (13, 1691515), (31, 709345), (35, 628277), (65, 338303), (91, 241645), (155, 141869), (217, 101335), (403, 54565), (455, 48329), (1085, 20267), (1559, 14105), (2015, 10913), (2821, 7795)]