21777784

素因数分解:

$2^3\times 7^1\times {\mathrm{157}}^1\times {\mathrm{2477}}^1$

素因数の和:2647

約数の個数: 32

約数和(自身を含む): 46982880

約数和(自身を除く): 25205096

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 157, 314, 628, 1099, 1256, 2198, 2477, 4396, 4954, 8792, 9908, 17339, 19816, 34678, 69356, 138712, 388889, 777778, 1555556, 2722223, 3111112, 5444446, 10888892, 21777784]

約数ペア:

[(1, 21777784), (2, 10888892), (4, 5444446), (7, 3111112), (8, 2722223), (14, 1555556), (28, 777778), (56, 388889), (157, 138712), (314, 69356), (628, 34678), (1099, 19816), (1256, 17339), (2198, 9908), (2477, 8792), (4396, 4954)]