20502391

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{457}}^1$

素因数の和:523

約数の個数: 32

約数和(自身を含む): 27699840

約数和(自身を除く): 7197449

約数列:

[1, 7, 13, 17, 29, 91, 119, 203, 221, 377, 457, 493, 1547, 2639, 3199, 3451, 5941, 6409, 7769, 13253, 41587, 44863, 54383, 92771, 100997, 172289, 225301, 706979, 1206023, 1577107, 2928913, 20502391]

約数ペア:

[(1, 20502391), (7, 2928913), (13, 1577107), (17, 1206023), (29, 706979), (91, 225301), (119, 172289), (203, 100997), (221, 92771), (377, 54383), (457, 44863), (493, 41587), (1547, 13253), (2639, 7769), (3199, 6409), (3451, 5941)]