20820891

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1439}}^1$

素因数の和:1515

約数の個数: 32

約数和(自身を含む): 34836480

約数和(自身を除く): 14015589

約数列:

[1, 3, 7, 13, 21, 39, 53, 91, 159, 273, 371, 689, 1113, 1439, 2067, 4317, 4823, 10073, 14469, 18707, 30219, 56121, 76267, 130949, 228801, 392847, 533869, 991471, 1601607, 2974413, 6940297, 20820891]

約数ペア:

[(1, 20820891), (3, 6940297), (7, 2974413), (13, 1601607), (21, 991471), (39, 533869), (53, 392847), (91, 228801), (159, 130949), (273, 76267), (371, 56121), (689, 30219), (1113, 18707), (1439, 14469), (2067, 10073), (4317, 4823)]