20505226

素因数分解:

$2^1\times 7^3\times {\mathrm{71}}^1\times {\mathrm{421}}^1$

素因数の和:515

約数の個数: 32

約数和(自身を含む): 36460800

約数和(自身を除く): 15955574

約数列:

[1, 2, 7, 14, 49, 71, 98, 142, 343, 421, 497, 686, 842, 994, 2947, 3479, 5894, 6958, 20629, 24353, 29891, 41258, 48706, 59782, 144403, 209237, 288806, 418474, 1464659, 2929318, 10252613, 20505226]

約数ペア:

[(1, 20505226), (2, 10252613), (7, 2929318), (14, 1464659), (49, 418474), (71, 288806), (98, 209237), (142, 144403), (343, 59782), (421, 48706), (497, 41258), (686, 29891), (842, 24353), (994, 20629), (2947, 6958), (3479, 5894)]