16819881

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{157}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 25269888

約数和(自身を除く): 8450007

約数列:

[1, 3, 13, 39, 41, 67, 123, 157, 201, 471, 533, 871, 1599, 2041, 2613, 2747, 6123, 6437, 8241, 10519, 19311, 31557, 35711, 83681, 107133, 136747, 251043, 410241, 431279, 1293837, 5606627, 16819881]

約数ペア:

[(1, 16819881), (3, 5606627), (13, 1293837), (39, 431279), (41, 410241), (67, 251043), (123, 136747), (157, 107133), (201, 83681), (471, 35711), (533, 31557), (871, 19311), (1599, 10519), (2041, 8241), (2613, 6437), (2747, 6123)]