20411979

素因数分解:

$3^1\times 7^2\times {\mathrm{191}}^1\times {\mathrm{727}}^1$

素因数の和:935

約数の個数: 24

約数和(自身を含む): 31868928

約数和(自身を除く): 11456949

約数列:

[1, 3, 7, 21, 49, 147, 191, 573, 727, 1337, 2181, 4011, 5089, 9359, 15267, 28077, 35623, 106869, 138857, 416571, 971999, 2915997, 6803993, 20411979]

約数ペア:

[(1, 20411979), (3, 6803993), (7, 2915997), (21, 971999), (49, 416571), (147, 138857), (191, 106869), (573, 35623), (727, 28077), (1337, 15267), (2181, 9359), (4011, 5089)]