21771747

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{163}}^1$

素因数の和:289

約数の個数: 40

約数和(自身を含む): 35004816

約数和(自身を除く): 13233069

約数列:

[1, 3, 9, 17, 27, 51, 81, 97, 153, 163, 291, 459, 489, 873, 1377, 1467, 1649, 2619, 2771, 4401, 4947, 7857, 8313, 13203, 14841, 15811, 24939, 44523, 47433, 74817, 133569, 142299, 224451, 268787, 426897, 806361, 1280691, 2419083, 7257249, 21771747]

約数ペア:

[(1, 21771747), (3, 7257249), (9, 2419083), (17, 1280691), (27, 806361), (51, 426897), (81, 268787), (97, 224451), (153, 142299), (163, 133569), (291, 74817), (459, 47433), (489, 44523), (873, 24939), (1377, 15811), (1467, 14841), (1649, 13203), (2619, 8313), (2771, 7857), (4401, 4947)]