21515403

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1487}}^1$

素因数の和:1563

約数の個数: 32

約数和(自身を含む): 35997696

約数和(自身を除く): 14482293

約数列:

[1, 3, 7, 13, 21, 39, 53, 91, 159, 273, 371, 689, 1113, 1487, 2067, 4461, 4823, 10409, 14469, 19331, 31227, 57993, 78811, 135317, 236433, 405951, 551677, 1024543, 1655031, 3073629, 7171801, 21515403]

約数ペア:

[(1, 21515403), (3, 7171801), (7, 3073629), (13, 1655031), (21, 1024543), (39, 551677), (53, 405951), (91, 236433), (159, 135317), (273, 78811), (371, 57993), (689, 31227), (1113, 19331), (1487, 14469), (2067, 10409), (4461, 4823)]