16978115

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{211}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 27068160

約数和(自身を除く): 10090045

約数列:

[1, 5, 7, 11, 19, 35, 55, 77, 95, 121, 133, 209, 211, 385, 605, 665, 847, 1045, 1055, 1463, 1477, 2299, 2321, 4009, 4235, 7315, 7385, 11495, 11605, 16093, 16247, 20045, 25531, 28063, 44099, 80465, 81235, 127655, 140315, 178717, 220495, 308693, 485089, 893585, 1543465, 2425445, 3395623, 16978115]

約数ペア:

[(1, 16978115), (5, 3395623), (7, 2425445), (11, 1543465), (19, 893585), (35, 485089), (55, 308693), (77, 220495), (95, 178717), (121, 140315), (133, 127655), (209, 81235), (211, 80465), (385, 44099), (605, 28063), (665, 25531), (847, 20045), (1045, 16247), (1055, 16093), (1463, 11605), (1477, 11495), (2299, 7385), (2321, 7315), (4009, 4235)]