399742512

素因数分解:

$2^4\times 3^1\times {\mathrm{13}}^1\times {\mathrm{640613}}^1$

素因数の和:640637

約数の個数: 40

約数和(自身を含む): 1112105904

約数和(自身を除く): 712363392

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 48, 52, 78, 104, 156, 208, 312, 624, 640613, 1281226, 1921839, 2562452, 3843678, 5124904, 7687356, 8327969, 10249808, 15374712, 16655938, 24983907, 30749424, 33311876, 49967814, 66623752, 99935628, 133247504, 199871256, 399742512]

約数ペア:

[(1, 399742512), (2, 199871256), (3, 133247504), (4, 99935628), (6, 66623752), (8, 49967814), (12, 33311876), (13, 30749424), (16, 24983907), (24, 16655938), (26, 15374712), (39, 10249808), (48, 8327969), (52, 7687356), (78, 5124904), (104, 3843678), (156, 2562452), (208, 1921839), (312, 1281226), (624, 640613)]